Move IME related functions from WebFrame to WebLocalFrame

third_party/WebKit/Source/web/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 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
@@ skipping 2888 matching lines @@
     // FIXME: Either this should only deal with WebLocalFrames or it should move to WebFrame.
     if (!relativeToFrame)
         relativeToFrame = mainFrame();
     Frame* frame = toWebLocalFrameImpl(relativeToFrame)->frame();
     frame = frame->tree().find(name);
     if (!frame || !frame->isLocalFrame())
         return nullptr;
     return WebLocalFrameImpl::fromFrame(toLocalFrame(frame));
 }
 
-WebFrame* WebViewImpl::focusedFrame()
+WebLocalFrame* WebViewImpl::focusedFrame()
 {
-    return WebFrame::fromFrame(focusedCoreFrame());
+    Frame* frame = focusedCoreFrame();
+    if (!frame || !frame->isLocalFrame())

[dcheng, 2016/06/13 17:29:45]

Let's just assert that this is local. All the return paths claim to return a
local frame already.

+        return nullptr;
+    return WebLocalFrameImpl::fromFrame(toLocalFrame(frame));
 }
 
 void WebViewImpl::setFocusedFrame(WebFrame* frame)
 {
     if (!frame) {
         // Clears the focused frame if any.
         Frame* focusedFrame = focusedCoreFrame();
         if (focusedFrame && focusedFrame->isLocalFrame())
             toLocalFrame(focusedFrame)->selection().setFocused(false);
         return;
@@ skipping 1645 matching lines @@
 {
     // TODO(oshima): Investigate if this should return the ScreenInfo's scale factor rather than
     // page's scale factor, which can be 1 in use-zoom-for-dsf mode.
     if (!page())
         return 1;
 
     return page()->deviceScaleFactor();
 }
 
 } // namespace blink