Implement HiDPI support in Pepper dev interface

webkit/plugins/ppapi/ppb_graphics_2d_impl.h

Index: webkit/plugins/ppapi/ppb_graphics_2d_impl.h
diff --git a/webkit/plugins/ppapi/ppb_graphics_2d_impl.h b/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
index 69e0f96fa9b9dfb99ae235e9a9816acc01889744..cec39c61e5e24785525c456a9a8fe03adfd980d7 100644
--- a/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
+++ b/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
@@ -51,6 +51,8 @@ class PPB_Graphics2D_Impl : public ::ppapi::Resource,
   virtual void ReplaceContents(PP_Resource image_data) OVERRIDE;
   virtual int32_t Flush(
       scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
+  virtual bool SetScale(float scale) OVERRIDE;
+  virtual float GetScale() OVERRIDE;
 
   bool ReadImageData(PP_Resource image, const PP_Point* top_left);
 
@@ -185,6 +187,10 @@ class PPB_Graphics2D_Impl : public ::ppapi::Resource,
   // This allows us to do more optimized painting in some cases.
   bool is_always_opaque_;
 
+  // Set to the scale between what the plugin considers to be one pixel and one
+  // DIP
+  float scale_;
+
   base::WeakPtrFactory<PPB_Graphics2D_Impl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Graphics2D_Impl);