1 files changed, 20 insertions, 18 deletions

diff --git a/WebCore/bindings/v8/V8Binding.h b/WebCore/bindings/v8/V8Binding.h
index a15ece1..4656aa2 100644
--- a/WebCore/bindings/v8/V8Binding.h
+++ b/WebCore/bindings/v8/V8Binding.h
@@ -1,10 +1,10 @@
 /*
 * Copyright (C) 2009 Google 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:
-* 
+*
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
@@ -14,7 +14,7 @@
 *     * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
@@ -40,7 +40,7 @@
 #include <v8.h>
 
 namespace WebCore {
-    
+
     class EventListener;
     class EventTarget;
     class V8BindingDOMWindow;
@@ -50,6 +50,8 @@ namespace WebCore {
     public:
         typedef v8::Handle<v8::Value> Value;
         typedef V8BindingDOMWindow DOMWindow;
+
+        static Value emptyScriptValue() { return v8::Local<v8::Value>(); }
     };
     typedef BindingSecurity<V8Binding> V8BindingSecurity;
     
@@ -61,7 +63,7 @@ namespace WebCore {
     template <typename StringType>
     StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode external);
 
-    // Convert v8 types to a WebCore::String. If the V8 string is not already
+    // Convert v8 types to a WTF::String. If the V8 string is not already
     // an external string then it is transformed into an external string at this
     // point to avoid repeated conversions.
     inline String v8StringToWebCoreString(v8::Handle<v8::String> v8String)
@@ -71,7 +73,7 @@ namespace WebCore {
     String v8NonStringValueToWebCoreString(v8::Handle<v8::Value>);
     String v8ValueToWebCoreString(v8::Handle<v8::Value> value);
 
-    // Convert v8 types to a WebCore::AtomicString.
+    // Convert v8 types to a WTF::AtomicString.
     inline AtomicString v8StringToAtomicWebCoreString(v8::Handle<v8::String> v8String)
     {
         return v8StringToWebCoreString<AtomicString>(v8String, Externalize);
@@ -110,8 +112,8 @@ namespace WebCore {
         return v8ExternalString(string);
     }
 
-    // Enables caching v8 wrappers created for WebCore::StringImpl.  Currently this cache requires
-    // all the calls (both to convert WebCore::String to v8::String and to GC the handle)
+    // Enables caching v8 wrappers created for WTF::StringImpl.  Currently this cache requires
+    // all the calls (both to convert WTF::String to v8::String and to GC the handle)
     // to be performed on the main thread.
     void enableStringImplCache();
 
@@ -152,7 +154,7 @@ namespace WebCore {
     {
         return v8ValueToWebCoreString(object);
     }
-    
+
     String toWebCoreString(const v8::Arguments&, int index);
 
     // The string returned by this function is still owned by the argument
@@ -171,7 +173,7 @@ namespace WebCore {
     AtomicString toAtomicWebCoreStringWithNullCheck(v8::Handle<v8::Value> value);
 
     String toWebCoreStringWithNullOrUndefinedCheck(v8::Handle<v8::Value> value);
- 
+
     v8::Handle<v8::String> v8UndetectableString(const String& str);
 
     v8::Handle<v8::Value> v8StringOrNull(const String& str);
@@ -183,31 +185,31 @@ namespace WebCore {
     double toWebCoreDate(v8::Handle<v8::Value> object);
 
     v8::Handle<v8::Value> v8DateOrNull(double value);
-    
+
     v8::Persistent<v8::FunctionTemplate> createRawTemplate();
 
     struct BatchedAttribute;
     struct BatchedCallback;
-    
+
     v8::Local<v8::Signature> configureTemplate(v8::Persistent<v8::FunctionTemplate>,
                                                const char* interfaceName,
                                                v8::Persistent<v8::FunctionTemplate> parentClass,
                                                int fieldCount,
-                                               const BatchedAttribute*, 
+                                               const BatchedAttribute*,
                                                size_t attributeCount,
                                                const BatchedCallback*,
                                                size_t callbackCount);
-    
+
     v8::Handle<v8::Value> getElementStringAttr(const v8::AccessorInfo&,
                                                const QualifiedName&);
     void setElementStringAttr(const v8::AccessorInfo&,
                               const QualifiedName&,
                               v8::Local<v8::Value>);
 
-    
+
     v8::Persistent<v8::String> getToStringName();
     v8::Persistent<v8::FunctionTemplate> getToStringTemplate();
-    
+
     // V8Parameter is an adapter class that converts V8 values to Strings
     // or AtomicStrings as appropriate, using multiple typecast operators.
     enum V8ParameterMode {
@@ -218,13 +220,13 @@ namespace WebCore {
     template <V8ParameterMode MODE = DefaultMode>
     class V8Parameter {
     public:
-        V8Parameter (v8::Local<v8::Value> object) :m_v8Object(object) { }
+        V8Parameter(v8::Local<v8::Value> object = v8::Local<v8::Value>()) : m_v8Object(object) { }
         operator String();
         operator AtomicString();
     private:
         v8::Local<v8::Value> m_v8Object;
     };
-    
+
     template<> inline V8Parameter<DefaultMode>::operator String() { return toWebCoreString(m_v8Object); }
     template<> inline V8Parameter<WithNullCheck>::operator String() { return toWebCoreStringWithNullCheck(m_v8Object); }
     template<> inline V8Parameter<WithUndefinedOrNullCheck>::operator String() { return toWebCoreStringWithNullOrUndefinedCheck(m_v8Object); }