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diff --git a/Source/WebKit/mac/WebInspector/WebNodeHighlighter.mm b/Source/WebKit/mac/WebInspector/WebNodeHighlighter.mm
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+++ b/Source/WebKit/mac/WebInspector/WebNodeHighlighter.mm
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+/*
+ * Copyright (C) 2006, 2007 Apple 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 "WebNodeHighlighter.h"
+
+#import "DOMNodeInternal.h"
+#import "WebNodeHighlight.h"
+#import "WebViewInternal.h"
+#import <WebCore/Page.h>
+
+@implementation WebNodeHighlighter
+
+- (id)initWithInspectedWebView:(WebView *)webView
+{
+    if (!(self = [super init]))
+        return nil;
+
+    // Don't retain to avoid a circular reference.
+    _inspectedWebView = webView;
+
+    return self;
+}
+
+- (void)dealloc
+{
+    ASSERT(!_currentHighlight);
+    [super dealloc];
+}
+
+// MARK: -
+
+- (void)highlightNode:(DOMNode *)node
+{
+    // The scrollview's content view stays around between page navigations, so target it.
+    NSView *view = [[[[[_inspectedWebView mainFrame] frameView] documentView] enclosingScrollView] contentView];
+    if (![view window])
+        return; // Skip the highlight if we have no window (e.g. hidden tab).
+    
+    if (!_currentHighlight) {
+        _currentHighlight = [[WebNodeHighlight alloc] initWithTargetView:view inspectorController:[_inspectedWebView page]->inspectorController()];
+        [_currentHighlight setDelegate:self];
+        [_currentHighlight attach];
+    } else
+        [[_currentHighlight highlightView] setNeedsDisplay:YES];
+}
+
+- (void)hideHighlight
+{
+    [_currentHighlight detach];
+    [_currentHighlight setDelegate:nil];
+    [_currentHighlight release];
+    _currentHighlight = nil;
+}
+
+// MARK: -
+// MARK: WebNodeHighlight delegate
+
+- (void)didAttachWebNodeHighlight:(WebNodeHighlight *)highlight
+{
+    [_inspectedWebView setCurrentNodeHighlight:highlight];
+}
+
+- (void)willDetachWebNodeHighlight:(WebNodeHighlight *)highlight
+{
+    [_inspectedWebView setCurrentNodeHighlight:nil];
+}
+    
+@end