Preparing Blink for cross-process frame tree replication

Source/web/WebLocalFrameImpl.cpp

 /*
  * Copyright (C) 2009 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 1595 matching lines @@
     }
 }
 
 void WebLocalFrameImpl::createFrameView()
 {
     TRACE_EVENT0("blink", "WebLocalFrameImpl::createFrameView");
 
     ASSERT(frame()); // If frame() doesn't exist, we probably didn't init properly.
 
     WebViewImpl* webView = viewImpl();
-    bool isMainFrame = webView->mainFrameImpl()->frame() == frame();
-    if (isMainFrame)
+    bool isLocalRoot = frame()->isLocalRoot();
+    if (isLocalRoot)
         webView->suppressInvalidations(true);
 
     frame()->createView(webView->size(), webView->baseBackgroundColor(), webView->isTransparent());
-    if (webView->shouldAutoResize() && isMainFrame)
+    if (webView->shouldAutoResize() && isLocalRoot)
         frame()->view()->enableAutoSizeMode(true, webView->minAutoSize(), webView->maxAutoSize());
 
     frame()->view()->setInputEventsTransformForEmulation(m_inputEventsOffsetForEmulation, m_inputEventsScaleFactorForEmulation);
 
-    if (isMainFrame)
+    if (isLocalRoot)
         webView->suppressInvalidations(false);
 }
 
 WebLocalFrameImpl* WebLocalFrameImpl::fromFrame(LocalFrame* frame)
 {
     if (!frame)
         return 0;
     return fromFrame(*frame);
 }
 
@@ skipping 213 matching lines @@
 
 void WebLocalFrameImpl::invalidateAll() const
 {
     ASSERT(frame() && frame()->view());
     FrameView* view = frame()->view();
     view->invalidateRect(view->frameRect());
     invalidateScrollbar();
 }
 
 } // namespace blink