mac: Finish plumbing for Pepper3D Image Chromium.

content/renderer/pepper/ppb_graphics_3d_impl.h

Index: content/renderer/pepper/ppb_graphics_3d_impl.h
diff --git a/content/renderer/pepper/ppb_graphics_3d_impl.h b/content/renderer/pepper/ppb_graphics_3d_impl.h
index abafd2c4b14bd0eaf87ca780c0f5e42d315e0ad9..5d926ec110cc5ca0ba2b87d8259d0ca6cacd00c4 100644
--- a/content/renderer/pepper/ppb_graphics_3d_impl.h
+++ b/content/renderer/pepper/ppb_graphics_3d_impl.h
@@ -70,7 +70,9 @@ class PPB_Graphics3D_Impl : public ppapi::PPB_Graphics3D_Shared,
   // ppapi::PPB_Graphics3D_Shared overrides.
   gpu::CommandBuffer* GetCommandBuffer() override;
   gpu::GpuControl* GetGpuControl() override;
-  int32_t DoSwapBuffers(const gpu::SyncToken& sync_token) override;
+  int32_t DoSwapBuffers(const gpu::SyncToken& sync_token,
+                        int32_t width,
+                        int32_t height) override;
 
  private:
   explicit PPB_Graphics3D_Impl(PP_Instance instance);
@@ -110,7 +112,14 @@ class PPB_Graphics3D_Impl : public ppapi::PPB_Graphics3D_Shared,
   bool lost_context_ = false;
 #endif
 
+  // The width and height of the command buffer back buffer are first sized from
+  // this process, but then resized by the pepper process. Cache the original
+  // size.
+  int32_t original_width_ = 0;
+  int32_t original_height_ = 0;
+
   bool has_alpha_;
+  bool use_image_chromium_;
   std::unique_ptr<gpu::CommandBufferProxyImpl> command_buffer_;
 
   base::WeakPtrFactory<PPB_Graphics3D_Impl> weak_ptr_factory_;