Structured cloning: improve DataCloneError reporting.

Source/bindings/v8/V8Utilities.h

Index: Source/bindings/v8/V8Utilities.h
diff --git a/Source/bindings/v8/V8Utilities.h b/Source/bindings/v8/V8Utilities.h
index 4a0efd41b96e513a6862805a64f5f445ac7ac62e..1269e44e84262bff874acdb8f09874509fb80cb1 100644
--- a/Source/bindings/v8/V8Utilities.h
+++ b/Source/bindings/v8/V8Utilities.h
@@ -43,6 +43,7 @@ namespace WebCore {
     class EventListener;
     class MessagePort;
     class ExecutionContext;
+    class ExceptionState;
 
     // Use an array to hold dependents. It works like a ref-counted scheme. A value can be added more than once to the DOM object.
     void createHiddenDependency(v8::Handle<v8::Object>, v8::Local<v8::Value>, int cacheIndex, v8::Isolate*);
@@ -58,11 +59,9 @@ namespace WebCore {
 
     // Helper function which pulls the values out of a JS sequence and into a MessagePortArray.
     // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3
-    // of the HTML5 spec and generates exceptions as appropriate. If the supplied argument's type isn't
-    // a JS sequence, a type error is signalled by setting 'notASequence' to true -- the caller
-    // then being responsible for generating a TypeError having a message that fits the context.
+    // of the HTML5 spec and generates exceptions as appropriate.
     // Returns true if the array was filled, or false if the passed value was not of an appropriate type.
-    bool extractTransferables(v8::Local<v8::Value>, MessagePortArray&, ArrayBufferArray&, bool& notASequence, v8::Isolate*);
+    bool extractTransferables(v8::Local<v8::Value>, int, MessagePortArray&, ArrayBufferArray&, ExceptionState&, v8::Isolate*);
 
     bool getMessagePortArray(v8::Local<v8::Value>, const String& propertyName, MessagePortArray&, v8::Isolate*);
     bool getMessagePortArray(v8::Local<v8::Value>, int argumentIndex, MessagePortArray&, v8::Isolate*);