cc: Use the correct internal format for glCopyTexImage2D calls.

ui/compositor/test/in_process_context_provider.h

Index: ui/compositor/test/in_process_context_provider.h
diff --git a/ui/compositor/test/in_process_context_provider.h b/ui/compositor/test/in_process_context_provider.h
index 7e20ed1100e732f179bf1358ba7f6b5876c8bbd8..b08c33c7baf257d055feb316c1c9bbefc46e2290 100644
--- a/ui/compositor/test/in_process_context_provider.h
+++ b/ui/compositor/test/in_process_context_provider.h
@@ -45,7 +45,7 @@ class InProcessContextProvider : public cc::ContextProvider {
       gpu::ImageFactory* image_factory,
       InProcessContextProvider* shared_context);
 
-  // cc::ContextProvider:
+  // cc::ContextProvider implementation.
   bool BindToCurrentThread() override;
   void DetachFromThread() override;
   gpu::Capabilities ContextCapabilities() override;
@@ -58,6 +58,10 @@ class InProcessContextProvider : public cc::ContextProvider {
   void SetLostContextCallback(
       const LostContextCallback& lost_context_callback) override;
 
+  // Gives the GL internal format that should be used for calling CopyTexImage2D
+  // on the default framebuffer.
+  uint32_t GetCopyTextureInternalFormat();
+
  private:
   InProcessContextProvider(
       const gpu::gles2::ContextCreationAttribHelper& attribs,