[DevTools] Blink-side APIs for device metrics emulation in content.

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 3463 matching lines @@
     return true;
 }
 
 void WebViewImpl::setInspectorSetting(const WebString& key,
                                       const WebString& value)
 {
     m_inspectorSettingsMap->set(key, value);
     client()->didUpdateInspectorSetting(key, value);
 }
 
+void WebViewImpl::setCompositorDeviceScaleFactorOverride(float deviceScaleFactor)
+{
+}
+
+void WebViewImpl::setRootLayerScaleTransform(float rootLayerScale)
+{
+}
+
 WebDevToolsAgent* WebViewImpl::devToolsAgent()
 {
     return m_devToolsAgent.get();
 }
 
 WebAXObject WebViewImpl::accessibilityObject()
 {
     if (!mainFrameImpl())
         return WebAXObject();
 
@@ skipping 702 matching lines @@
     //    the initial viewport width.
     // 2. The author has disabled viewport zoom.
 
     const PageScaleConstraints& constraints = m_pageScaleConstraintsSet.pageDefinedConstraints();
 
     return fixedLayoutSize().width == m_size.width
         || (constraints.minimumScale == constraints.maximumScale && constraints.minimumScale != -1);
 }
 
 } // namespace WebKit