Make V8Binding helpers return LocalFrame/LocalDOMWindow as appropriate

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index 4deb1c6ba3876fe687a5581c750d90514e753607..a280c6bb0425930942e23beb63f866b22420c740 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -506,8 +506,7 @@ WebLocalFrame* WebLocalFrame::frameForCurrentContext() {
 }
 
 WebLocalFrame* WebLocalFrame::frameForContext(v8::Local<v8::Context> context) {
-  return WebLocalFrameImpl::fromFrame(
-      toLocalFrame(toFrameIfNotDetached(context)));
+  return WebLocalFrameImpl::fromFrame(toLocalFrameIfNotDetached(context));
 }
 
 WebLocalFrame* WebLocalFrame::fromFrameOwnerElement(const WebElement& element) {