Fix page zoom to be frame-centric for out-of-process frames.

content/browser/renderer_host/render_view_host_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 202 matching lines @@
 
   // Returns the SessionStorageNamespace the render view should use. Might
   // create the SessionStorageNamespace on the fly.
   virtual SessionStorageNamespace* GetSessionStorageNamespace(
       SiteInstance* instance);
 
   // Returns a copy of the map of all session storage namespaces related
   // to this view.
   virtual SessionStorageNamespaceMap GetSessionStorageNamespaceMap();
 
+  // Returns the zoom level for the page.
+  virtual double PageZoomLevel();

[ncarter (slow), 2016/04/11 22:17:03]

Rename to GetPageZoomLevel

[wjmaclean, 2016/04/13 18:47:47]

Done.

+
   // Returns true if the RenderViewHost will never be visible.
   virtual bool IsNeverVisible();
 
   // Returns the FrameTree the render view should use. Guaranteed to be constant
   // for the lifetime of the render view.
   //
   // TODO(ajwong): Remove once the main frame RenderFrameHost is no longer
   // created by the RenderViewHost.
   virtual FrameTree* GetFrameTree();
 
   // Optional state storage for if the Virtual Keyboard has been requested by
   // this page or not. If it has, this can be used to suppress things like the
   // link disambiguation dialog, which doesn't interact well with the virtual
   // keyboard.
   virtual void SetIsVirtualKeyboardRequested(bool requested) {}
   virtual bool IsVirtualKeyboardRequested();
 
  protected:
   virtual ~RenderViewHostDelegate() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_