mac: Make dynamic DPI changes work.

content/renderer/render_view_impl.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_RENDERER_RENDER_VIEW_IMPL_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 728 matching lines @@
   virtual void OnWasHidden() OVERRIDE;
   virtual void OnWasRestored(bool needs_repainting) OVERRIDE;
   virtual bool SupportsAsynchronousSwapBuffers() OVERRIDE;
   virtual void OnImeSetComposition(
       const string16& text,
       const std::vector<WebKit::WebCompositionUnderline>& underlines,
       int selection_start,
       int selection_end) OVERRIDE;
   virtual void OnImeConfirmComposition(
       const string16& text, const ui::Range& replacement_range) OVERRIDE;
+  virtual void OnSetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
   virtual ui::TextInputType GetTextInputType() OVERRIDE;
   virtual void GetSelectionBounds(gfx::Rect* start, gfx::Rect* end) OVERRIDE;
   virtual void GetCompositionCharacterBounds(
       std::vector<gfx::Rect>* character_bounds) OVERRIDE;
   virtual bool CanComposeInline() OVERRIDE;
   virtual bool WebWidgetHandlesCompositorScheduling() const OVERRIDE;
 
  private:
   // For unit tests.
   friend class ExternalPopupMenuTest;
@@ skipping 672 matching lines @@
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.  You can
   // use the Observer interface to filter IPC messages and receive frame change
   // notifications.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_