Don't update viewport size from UpdateAfterLayout.

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 3673 matching lines @@
       frame->View()->SetInitialViewportSize(size_);
 
       client_->DidAutoResize(size_);
       SendResizeEventAndRepaint();
     }
   }
 
   if (GetPageScaleConstraintsSet().ConstraintsDirty())
     RefreshPageScaleFactorAfterLayout();
 
-  UpdateICBAndResizeViewport();
+  ResizeFrameView(webframe);
 }
 
 void WebViewImpl::LayoutUpdated(WebLocalFrameImpl* webframe) {
   LocalFrame* frame = webframe->GetFrame();
   if (!client_ || !client_->CanUpdateLayout() || !frame->IsMainFrame())
     return;
 
   ResizeAfterLayout(webframe);
 
   // Relayout immediately to avoid violating the rule that needsLayout()
@@ skipping 475 matching lines @@
   if (focused_frame->LocalFrameRoot() != MainFrameImpl()->GetFrame())
     return nullptr;
   return focused_frame;
 }
 
 LocalFrame* WebViewImpl::FocusedLocalFrameAvailableForIme() const {
   return ime_accept_events_ ? FocusedLocalFrameInWidget() : nullptr;
 }
 
 }  // namespace blink