Extract a DOMWindow interface from LocalDOMWindow and use it in the idl.

Source/bindings/core/v8/V8Binding.h

Index: Source/bindings/core/v8/V8Binding.h
diff --git a/Source/bindings/core/v8/V8Binding.h b/Source/bindings/core/v8/V8Binding.h
index ef09c6aad52ebdb0eda5ffa66ba3225744f52314..be37ff85699cb8dc07d52dea9e7d358ded92be6b 100644
--- a/Source/bindings/core/v8/V8Binding.h
+++ b/Source/bindings/core/v8/V8Binding.h
@@ -50,11 +50,12 @@
 
 namespace blink {
 
-class LocalDOMWindow;
+class DOMWindow;
 class Document;
 class EventListener;
 class ExecutionContext;
 class ExceptionState;
+class LocalDOMWindow;
 class LocalFrame;
 class NodeFilter;
 class XPathNSResolver;
@@ -1083,8 +1084,8 @@ struct NativeValueTraits<Vector<T> > {
 v8::Isolate* toIsolate(ExecutionContext*);
 v8::Isolate* toIsolate(LocalFrame*);
 
-LocalDOMWindow* toDOMWindow(v8::Handle<v8::Value>, v8::Isolate*);
-LocalDOMWindow* toDOMWindow(v8::Handle<v8::Context>);
+DOMWindow* toDOMWindow(v8::Handle<v8::Value>, v8::Isolate*);
+DOMWindow* toDOMWindow(v8::Handle<v8::Context>);
 LocalDOMWindow* enteredDOMWindow(v8::Isolate*);
 LocalDOMWindow* currentDOMWindow(v8::Isolate*);
 LocalDOMWindow* callingDOMWindow(v8::Isolate*);