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 3b8ce9a87162113dfe7a1ff48072889c53b9a3a2..a4fda98d49696ce9ae2e0685216588b1e503ef8d 100644
--- a/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
+++ b/webkit/plugins/ppapi/ppb_graphics_2d_impl.h
@@ -33,7 +33,8 @@ class PPB_Graphics2D_Impl : public ::ppapi::Resource,
 
   static PP_Resource Create(PP_Instance instance,
                             const PP_Size& size,
-                            PP_Bool is_always_opaque);
+                            PP_Bool is_always_opaque,
+                            float scale);
 
   bool is_always_opaque() const { return is_always_opaque_; }
 
@@ -75,7 +76,7 @@ class PPB_Graphics2D_Impl : public ::ppapi::Resource,
  private:
   explicit PPB_Graphics2D_Impl(PP_Instance instance);
 
-  bool Init(int width, int height, bool is_always_opaque);
+  bool Init(int width, int height, bool is_always_opaque, float scale);
 
   // Tracks a call to flush that requires a callback.
   class FlushCallbackData {
@@ -184,6 +185,10 @@ 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);