gpu: Implement idle async pixel transfers.

ui/gl/async_pixel_transfer_delegate_stub.cc

Index: ui/gl/async_pixel_transfer_delegate_stub.cc
diff --git a/ui/gl/async_pixel_transfer_delegate_stub.cc b/ui/gl/async_pixel_transfer_delegate_stub.cc
index 2ec16bbcff4adaae952960a31151301053a852ed..9c127f6561011cbee170f89143e6b61a5fc2c4cc 100644
--- a/ui/gl/async_pixel_transfer_delegate_stub.cc
+++ b/ui/gl/async_pixel_transfer_delegate_stub.cc
@@ -28,13 +28,6 @@ void* GetAddress(SharedMemory* shared_memory,
 
 namespace gfx {
 
-#if !defined(OS_ANDROID)
-scoped_ptr<AsyncPixelTransferDelegate>
-    AsyncPixelTransferDelegate::Create(gfx::GLContext* context) {
-  return AsyncPixelTransferDelegateStub::Create(context);
-}
-#endif
-
 scoped_ptr<AsyncPixelTransferDelegate>
       AsyncPixelTransferDelegateStub::Create(gfx::GLContext* context) {
   return make_scoped_ptr(
@@ -141,5 +134,11 @@ base::TimeDelta AsyncPixelTransferDelegateStub::GetTotalTextureUploadTime() {
   return total_texture_upload_time_;
 }
 
+void AsyncPixelTransferDelegateStub::ProcessPendingTransfers() {}
+
+bool AsyncPixelTransferDelegateStub::NeedsProcessPendingTransfers() {
+  return false;
+}
+
 }  // namespace gfx