Split WebLocalFrame into a distinct subclass of WebFrame.

public/web/WebLocalFrame.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebLocalFrame_h
 #define WebLocalFrame_h
 
-// FIXME: There is currently just a forwarding header until Chrome is updated to
-// use these types.
 #include "WebFrame.h"
 
+namespace blink {
+
+class WebLocalFrame : public WebFrame {
+public:
+    // Creates a WebFrame. Delete this WebFrame by calling WebFrame::close().
+    // It is valid to pass a null client pointer.
+    BLINK_EXPORT static WebLocalFrame* create(WebFrameClient*);
+
+    // Returns the WebFrame associated with the current V8 context. This
+    // function can return 0 if the context is associated with a Document that
+    // is not currently being displayed in a Frame.
+    BLINK_EXPORT static WebLocalFrame* frameForCurrentContext();
+
+    // Returns the frame corresponding to the given context. This can return 0
+    // if the context is detached from the frame, or if the context doesn't
+    // correspond to a frame (e.g., workers).
+    BLINK_EXPORT static WebLocalFrame* frameForContext(v8::Handle<v8::Context>);
+
+    // Returns the frame inside a given frame or iframe element. Returns 0 if
+    // the given element is not a frame, iframe or if the frame is empty.
+    BLINK_EXPORT static WebLocalFrame* fromFrameOwnerElement(const WebElement&);
+};
+
+} // namespace blink
+
 #endif // WebLocalFrame_h