Refactored GLContext to own GPUTiming which spawn GPUTimingClients.

gpu/command_buffer/service/gl_context_virtual.cc

Index: gpu/command_buffer/service/gl_context_virtual.cc
diff --git a/gpu/command_buffer/service/gl_context_virtual.cc b/gpu/command_buffer/service/gl_context_virtual.cc
index 765dbeebfdac6ce191c05ee5b719cabca5c835d0..7747407cf6dfba7887bd043afb45bd445fb1afba 100644
--- a/gpu/command_buffer/service/gl_context_virtual.cc
+++ b/gpu/command_buffer/service/gl_context_virtual.cc
@@ -7,6 +7,7 @@
 #include "gpu/command_buffer/service/gl_state_restorer_impl.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "ui/gl/gl_surface.h"
+#include "ui/gl/gpu_timing.h"
 
 namespace gpu {
 
@@ -82,6 +83,10 @@ void* GLContextVirtual::GetHandle() {
   return shared_context_->GetHandle();
 }
 
+scoped_refptr<gfx::GPUTimingClient> GLContextVirtual::CreateGPUTimingClient() {
+  return shared_context_->CreateGPUTimingClient();
+}
+
 void GLContextVirtual::OnSetSwapInterval(int interval) {
   shared_context_->SetSwapInterval(interval);
 }