Plumbing: Cache the resize callback so that we can call it later.

gpu/command_buffer/service/gpu_scheduler.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
@@ skipping 258 matching lines @@
 
 int32 GpuScheduler::GetGetOffset() {
   return parser_->get();
 }
 
 void GpuScheduler::ResizeOffscreenFrameBuffer(const gfx::Size& size) {
   decoder_->ResizeOffscreenFrameBuffer(size);
 }
 
 void GpuScheduler::SetResizeCallback(Callback1<gfx::Size>::Type* callback) {
-  decoder_->SetResizeCallback(callback);
+  wrapped_resize_callback_.reset(callback);
+  decoder_->SetResizeCallback(
+      NewCallback(this,
+                  &GpuScheduler::WillResize));
 }
 
 void GpuScheduler::SetSwapBuffersCallback(
     Callback0::Type* callback) {
   wrapped_swap_buffers_callback_.reset(callback);
   decoder_->SetSwapBuffersCallback(
       NewCallback(this,
                   &GpuScheduler::WillSwapBuffers));
 }
 
 void GpuScheduler::SetCommandProcessedCallback(
     Callback0::Type* callback) {
   command_processed_callback_.reset(callback);
 }
 
 void GpuScheduler::ScheduleProcessCommands() {
   MessageLoop::current()->PostTask(
       FROM_HERE,
       method_factory_.NewRunnableMethod(&GpuScheduler::ProcessCommands));
 }
 
+void GpuScheduler::WillResize(gfx::Size size) {
+  if (wrapped_resize_callback_.get()) {
+    wrapped_resize_callback_->Run(size);
+  }
+}
+
 }  // namespace gpu