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diff --git a/WebKit/mac/Misc/WebNSFileManagerExtras.m b/WebKit/mac/Misc/WebNSFileManagerExtras.m
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+++ b/WebKit/mac/Misc/WebNSFileManagerExtras.m
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+/*
+ * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer. 
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution. 
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#import <WebKit/WebNSFileManagerExtras.h>
+
+#import <JavaScriptCore/Assertions.h>
+#import <WebKit/WebKitNSStringExtras.h>
+#import <WebKitSystemInterface.h>
+
+#import <sys/mount.h>
+
+@implementation NSFileManager (WebNSFileManagerExtras)
+
+- (BOOL)_webkit_fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory traverseLink:(BOOL)flag
+{
+    BOOL result;
+    NSDictionary *attributes;
+
+    result = NO;
+    if (isDirectory) {
+        *isDirectory = NO;
+    }
+
+    attributes = [self fileAttributesAtPath:path traverseLink:flag];
+
+    if (attributes) {
+        result = YES;
+        if ([[attributes objectForKey:NSFileType] isEqualToString:NSFileTypeDirectory]) {
+            if (isDirectory) {
+                *isDirectory = YES;
+            }
+        }
+    }
+
+    return result;
+}
+
+- (BOOL)_webkit_createIntermediateDirectoriesForPath:(NSString *)path attributes:(NSDictionary *)attributes
+{
+    BOOL result;
+    NSArray *pathComponents;
+    BOOL isDir;
+    unsigned count;
+    unsigned i;
+    NSString *checkPath;
+    NSMutableString *subpath;
+            
+    if (!path || [path length] == 0 || ![path isAbsolutePath]) {
+        return NO;
+    }
+
+    result = NO;  
+
+    // check to see if the path to the file already exists        
+    if ([self _webkit_fileExistsAtPath:[path stringByDeletingLastPathComponent] isDirectory:&isDir traverseLink:YES]) {
+        if (isDir) {
+            result = YES;
+        }
+        else {
+            result = NO;
+        }
+    }
+    else {
+        // create the path to the file
+        result = YES;  
+
+        // assume that most of the path exists, look backwards until we find an existing subpath
+        checkPath = path;
+        while (![checkPath isEqualToString:@"/"]) {
+            checkPath = [checkPath stringByDeletingLastPathComponent];
+            if ([self _webkit_fileExistsAtPath:checkPath isDirectory:&isDir traverseLink:YES]) {
+                if (isDir) {
+                    break;
+                }
+                else {
+                    // found a leaf node, can't continue
+                    result = NO;
+                    break;
+                }
+            }
+        }
+
+        if (result) {
+            // now build up the path to the point where we found existing paths
+            subpath = [[NSMutableString alloc] initWithCapacity:[path length]];
+            pathComponents = [path componentsSeparatedByString:@"/"];    
+            count = [pathComponents count];
+            i = 0;
+            while (i < count - 1 && ![subpath isEqualToString:checkPath]) {
+                if (i > 0) {
+                    [subpath appendString:@"/"];
+                }
+                [subpath appendString:[pathComponents objectAtIndex:i]];  
+                i++;  
+            }
+            
+            // now create the parts of the path that did not yet exist
+            while (i < count - 1) {
+                if ([(NSString *)[pathComponents objectAtIndex:i] length] == 0) {
+                    continue;
+                }
+                if (i > 0) {
+                    [subpath appendString:@"/"];
+                }
+                [subpath appendString:[pathComponents objectAtIndex:i]];
+                
+                // does this directory exist?
+                if ([self _webkit_fileExistsAtPath:subpath isDirectory:&isDir traverseLink:YES]) {
+                    if (!isDir) {
+                        // ran into a leaf node of some sort
+                        result = NO;
+                        break;
+                    }
+                }
+                else {
+                    // subpath does not exist - create it
+                    if (![self createDirectoryAtPath:subpath attributes:attributes]) {
+                        // failed to create subpath
+                        result = NO;
+                        break;
+                    }
+                }
+                i++; 
+            }
+            
+            [subpath release];
+        }
+        
+    }    
+                            
+    return result;
+}
+
+- (BOOL)_webkit_createDirectoryAtPathWithIntermediateDirectories:(NSString *)path attributes:(NSDictionary *)attributes
+{
+    // Be really optimistic - assume that in the common case, the directory exists.
+    BOOL isDirectory;
+    if ([self fileExistsAtPath:path isDirectory:&isDirectory] && isDirectory) {
+        return YES;
+    }
+
+    // Assume the next most common case is that the parent directory already exists
+    if ([self createDirectoryAtPath:path attributes:attributes]) {
+        return YES;
+    }
+
+    // Do it the hard way 
+    return [self _webkit_createIntermediateDirectoriesForPath:path attributes:attributes] && [self createDirectoryAtPath:path attributes:attributes];
+}
+
+- (BOOL)_webkit_createFileAtPathWithIntermediateDirectories:(NSString *)path contents:(NSData *)contents attributes:(NSDictionary *)attributes directoryAttributes:(NSDictionary *)directoryAttributes
+{
+    // Be optimistic - try just creating the file first, assuming intermediate directories exist. 
+    if ([self createFileAtPath:path contents:contents attributes:attributes]) {
+        return YES;
+    }
+
+    return ([self _webkit_createIntermediateDirectoriesForPath:path attributes:directoryAttributes] && [self createFileAtPath:path contents:contents attributes:attributes]);
+}
+
+- (BOOL)_webkit_removeFileOnlyAtPath:(NSString *)path
+{
+    struct statfs buf;
+    BOOL result = unlink([path fileSystemRepresentation]) == 0;
+
+    // For mysterious reasons, MNT_DOVOLFS is the flag for "supports resource fork"
+    if ((statfs([path fileSystemRepresentation], &buf) == 0) && !(buf.f_flags & MNT_DOVOLFS)) {
+        NSString *lastPathComponent = [path lastPathComponent];
+        if ([lastPathComponent length] != 0 && ![lastPathComponent isEqualToString:@"/"]) {
+            NSString *resourcePath = [[path stringByDeletingLastPathComponent] stringByAppendingString:[@"._" stringByAppendingString:lastPathComponent]];
+            if (unlink([resourcePath fileSystemRepresentation]) != 0) {
+                result = NO;
+            }
+        }
+    }
+
+    return result;
+}
+
+- (void)_webkit_backgroundRemoveFileAtPath:(NSString *)path
+{
+    NSFileManager *manager;
+    NSString *moveToSubpath;
+    NSString *moveToPath;
+    int i;
+    
+    manager = [NSFileManager defaultManager];
+    
+    i = 0;
+    moveToSubpath = [path stringByDeletingLastPathComponent];
+    do {
+        moveToPath = [NSString stringWithFormat:@"%@/.tmp%d", moveToSubpath, i];
+        i++;
+    } while ([manager fileExistsAtPath:moveToPath]);
+
+    if ([manager movePath:path toPath:moveToPath handler:nil]) {
+        [NSThread detachNewThreadSelector:@selector(_performRemoveFileAtPath:) toTarget:self withObject:moveToPath];
+    }
+
+}
+
+- (void)_webkit_backgroundRemoveLeftoverFiles:(NSString *)path
+{
+    NSFileManager *manager;
+    NSString *leftoverSubpath;
+    NSString *leftoverPath;
+    int i;
+    
+    manager = [NSFileManager defaultManager];
+    leftoverSubpath = [path stringByDeletingLastPathComponent];
+    
+    i = 0;
+    while (1) {
+        leftoverPath = [NSString stringWithFormat:@"%@/.tmp%d", leftoverSubpath, i];
+        if (![manager fileExistsAtPath:leftoverPath]) {
+            break;
+        }
+        [NSThread detachNewThreadSelector:@selector(_performRemoveFileAtPath:) toTarget:self withObject:leftoverPath];
+        i++;
+    }
+}
+
+- (NSString *)_webkit_carbonPathForPath:(NSString *)posixPath
+{
+    OSStatus error;
+    FSRef ref, rootRef, parentRef;
+    FSCatalogInfo info;
+    NSMutableArray *carbonPathPieces;
+    HFSUniStr255 nameString;
+
+    // Make an FSRef.
+    error = FSPathMakeRef((const UInt8 *)[posixPath fileSystemRepresentation], &ref, NULL);
+    if (error != noErr) {
+        return nil;
+    }
+
+    // Get volume refNum.
+    error = FSGetCatalogInfo(&ref, kFSCatInfoVolume, &info, NULL, NULL, NULL);
+    if (error != noErr) {
+        return nil;
+    }
+
+    // Get root directory FSRef.
+    error = FSGetVolumeInfo(info.volume, 0, NULL, kFSVolInfoNone, NULL, NULL, &rootRef);
+    if (error != noErr) {
+        return nil;
+    }
+
+    // Get the pieces of the path.
+    carbonPathPieces = [NSMutableArray array];
+    for (;;) {
+        error = FSGetCatalogInfo(&ref, kFSCatInfoNone, NULL, &nameString, NULL, &parentRef);
+        if (error != noErr) {
+            return nil;
+        }
+        [carbonPathPieces insertObject:[NSString stringWithCharacters:nameString.unicode length:nameString.length] atIndex:0];
+        if (FSCompareFSRefs(&ref, &rootRef) == noErr) {
+            break;
+        }
+        ref = parentRef;
+    }
+
+    // Volume names need trailing : character.
+    if ([carbonPathPieces count] == 1) {
+        [carbonPathPieces addObject:@""];
+    }
+
+    return [carbonPathPieces componentsJoinedByString:@":"];
+}
+
+- (void)_webkit_setMetadataURL:(NSString *)URLString referrer:(NSString *)referrer atPath:(NSString *)path
+{
+    ASSERT(URLString);
+    ASSERT(path);
+    WKSetMetadataURL(URLString, referrer, path);
+}
+
+- (NSString *)_webkit_startupVolumeName
+{
+    NSString *path = [self _webkit_carbonPathForPath:@"/"];
+    return [path substringToIndex:[path length]-1];
+}
+
+- (NSString *)_webkit_pathWithUniqueFilenameForPath:(NSString *)path
+{
+    // "Fix" the filename of the path.
+    NSString *filename = [[path lastPathComponent] _webkit_filenameByFixingIllegalCharacters];
+    path = [[path stringByDeletingLastPathComponent] stringByAppendingPathComponent:filename];
+
+    NSFileManager *fileManager = [NSFileManager defaultManager];
+    if ([fileManager fileExistsAtPath:path]) {
+        // Don't overwrite existing file by appending "-n", "-n.ext" or "-n.ext.ext" to the filename.
+        NSString *extensions = nil;
+        NSString *pathWithoutExtensions;
+        NSString *lastPathComponent = [path lastPathComponent];
+        NSRange periodRange = [lastPathComponent rangeOfString:@"."];
+        
+        if (periodRange.location == NSNotFound) {
+            pathWithoutExtensions = path;
+        } else {
+            extensions = [lastPathComponent substringFromIndex:periodRange.location + 1];
+            lastPathComponent = [lastPathComponent substringToIndex:periodRange.location];
+            pathWithoutExtensions = [[path stringByDeletingLastPathComponent] stringByAppendingPathComponent:lastPathComponent];
+        }
+
+        NSString *pathWithAppendedNumber;
+        unsigned i;
+
+        for (i = 1; 1; i++) {
+            pathWithAppendedNumber = [NSString stringWithFormat:@"%@-%d", pathWithoutExtensions, i];
+            path = [extensions length] ? [pathWithAppendedNumber stringByAppendingPathExtension:extensions] : pathWithAppendedNumber;
+            if (![fileManager fileExistsAtPath:path]) {
+                break;
+            }
+        }
+    }
+
+    return path;
+}
+
+@end