Ensure zoom level is not updated if main frame is WebRemoteFrame.

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 3061 matching lines @@
 
 double WebViewImpl::setZoomLevel(double zoomLevel)
 {
     if (zoomLevel < m_minimumZoomLevel)
         m_zoomLevel = m_minimumZoomLevel;
     else if (zoomLevel > m_maximumZoomLevel)
         m_zoomLevel = m_maximumZoomLevel;
     else
         m_zoomLevel = zoomLevel;
 
+    // TODO(nasko): Setting zoom level needs to be refactored to support
+    // out-of-process iframes. See https://crbug.com/528407.
+    if (mainFrame()->isWebRemoteFrame())
+        return m_zoomLevel;
+
     LocalFrame* frame = mainFrameImpl()->frame();
     if (!WebLocalFrameImpl::pluginContainerFromFrame(frame)) {
         float zoomFactor = m_zoomFactorOverride ? m_zoomFactorOverride : static_cast<float>(zoomLevelToZoomFactor(m_zoomLevel));
         zoomFactor *= m_zoomFactorForDeviceScaleFactor;
         frame->setPageZoomFactor(zoomFactor);
     }
 
     return m_zoomLevel;
 }
 
@@ skipping 1524 matching lines @@
 void WebViewImpl::detachPaintArtifactCompositor()
 {
     if (!m_layerTreeView)
         return;
 
     m_layerTreeView->setDeferCommits(true);
     m_layerTreeView->clearRootLayer();
 }
 
 } // namespace blink