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

gpu/command_buffer/service/gpu_scheduler.cc

Index: gpu/command_buffer/service/gpu_scheduler.cc
diff --git a/gpu/command_buffer/service/gpu_scheduler.cc b/gpu/command_buffer/service/gpu_scheduler.cc
index 5fa9ceb3fd917c63e764051fb2e78e4efc668c4a..53fcfa249f919ef41cc2b42f609b034cbbff2efa 100644
--- a/gpu/command_buffer/service/gpu_scheduler.cc
+++ b/gpu/command_buffer/service/gpu_scheduler.cc
@@ -276,7 +276,10 @@ void GpuScheduler::ResizeOffscreenFrameBuffer(const gfx::Size& 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(
@@ -298,4 +301,10 @@ void GpuScheduler::ScheduleProcessCommands() {
       method_factory_.NewRunnableMethod(&GpuScheduler::ProcessCommands));
 }
 
+void GpuScheduler::WillResize(gfx::Size size) {
+  if (wrapped_resize_callback_.get()) {
+    wrapped_resize_callback_->Run(size);
+  }
+}
+
 }  // namespace gpu