Compute the popup location/size correctly when use-zoom-for-dsf is enabled.

content/public/renderer/render_view.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_PUBLIC_RENDERER_RENDER_VIEW_H_
 #define CONTENT_PUBLIC_RENDERER_RENDER_VIEW_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 106 matching lines @@
 
   // Returns |renderer_preferences_.accept_languages| value.
   virtual const std::string& GetAcceptLanguages() const = 0;
 
 #if defined(OS_ANDROID)
   virtual void UpdateTopControlsState(TopControlsState constraints,
                                       TopControlsState current,
                                       bool animate) = 0;
 #endif
 
-  // Converts the |rect| from Blink's Viewport coordinates to the
-  // coordinates in the native window used to display the content, in
-  // DIP.  They're identical in tradional world, but will differ when
-  // use-zoom-for-dsf feature is eanbled, and Viewport coordinates
-  // becomes DSF times larger than window coordinates.
+  // Converts the |rect| from Blink's Viewport coordinates to Window
+  // coordinates. See the comment on
+  // WebWidgetClient::convertViewportToWindow() for more details.
   virtual void convertViewportToWindow(blink::WebRect* rect) = 0;
 
  protected:
   ~RenderView() override {}
 
  private:
   // This interface should only be implemented inside content.
   friend class RenderViewImpl;
   RenderView() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_RENDER_VIEW_H_