Revert of Simplify ppapi Graphics3D size propagation a bit

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 dca5aaa98e7cd820b39c671c7aba6d8064314621..9255e024cb5e864ba3b58bc663b3a92d2e516c6f 100644
--- a/content/renderer/pepper/ppb_graphics_3d_impl.h
+++ b/content/renderer/pepper/ppb_graphics_3d_impl.h
@@ -75,7 +75,8 @@
   gpu::CommandBuffer* GetCommandBuffer() override;
   gpu::GpuControl* GetGpuControl() override;
   int32_t DoSwapBuffers(const gpu::SyncToken& sync_token,
-                        const gfx::Size& size) override;
+                        int32_t width,
+                        int32_t height) override;
 
  private:
   explicit PPB_Graphics3D_Impl(PP_Instance instance);
@@ -115,6 +116,12 @@
   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_;