Add display::GetDisplayNearestView

content/public/browser/render_widget_host_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_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_
 
 #include <memory>
 
 #include "base/strings/string16.h"
@@ skipping 67 matching lines @@
   // A floating point variant of the above. PointF values will be snapped to
   // integral points before transformation.
   virtual gfx::PointF TransformPointToRootCoordSpaceF(
       const gfx::PointF& point) = 0;
 
   // Retrieves the native view used to contain plugins and identify the
   // renderer in IPC messages.
   virtual gfx::NativeView GetNativeView() const = 0;
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
 
+  // Returns scale factor of the display nearest to the native view.
+  // Returns 1.0f if the platform does not support DIP.
+  virtual float GetScaleFactorForNativeView() const = 0;
+
   // Returns a ui::TextInputClient to support text input or nullptr if this RWHV
   // doesn't support text input.
   // Note: Not all the platforms use ui::InputMethod and ui::TextInputClient for
   // text input.  Some platforms (Mac and Android for example) use their own
   // text input system.
   virtual ui::TextInputClient* GetTextInputClient() = 0;
 
   // Set focus to the associated View component.
   virtual void Focus() = 0;
   // Returns true if the View currently has the focus.
@@ skipping 94 matching lines @@
   // Returns |true| if text is currently being spoken by Mac OS X.
   virtual bool IsSpeaking() const = 0;
   // Stops speaking, if it is currently in progress.
   virtual void StopSpeaking() = 0;
 #endif  // defined(OS_MACOSX)
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_H_