Removed redundant rect methods on FrameView

Source/core/frame/PinchViewport.cpp

 /*
  * Copyright (C) 2013 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 510 matching lines @@
     return frame->view()->frameRect();
 }
 
 IntSize PinchViewport::contentsSize() const
 {
     LocalFrame* frame = mainFrame();
 
     if (!frame || !frame->view())
         return IntSize();
 
-    ASSERT(frame->view()->visibleContentScaleFactor() == 1);
     return frame->view()->visibleContentRect(IncludeScrollbars).size();
 }
 
 void PinchViewport::invalidateScrollbarRect(Scrollbar*, const IntRect&)
 {
     // Do nothing. Pinch scrollbars live on the compositor thread and will
     // be updated when the viewport is synced to the CC.
 }
 
 void PinchViewport::setScrollOffset(const IntPoint& offset)
@@ skipping 122 matching lines @@
     } else if (graphicsLayer == m_rootTransformLayer) {
         name =  "Root Transform Layer";
     } else {
         ASSERT_NOT_REACHED();
     }
 
     return name;
 }
 
 } // namespace blink