WIP: Plumbing input event latency reporting through Mus GPU.

gpu/command_buffer/client/client_test_helper.h

Index: gpu/command_buffer/client/client_test_helper.h
diff --git a/gpu/command_buffer/client/client_test_helper.h b/gpu/command_buffer/client/client_test_helper.h
index f806fbbb6062ca2876c5e1c7baee19e801751dae..79b5fc4849a5ee7d444f0dbb2801f5c0f929bb6c 100644
--- a/gpu/command_buffer/client/client_test_helper.h
+++ b/gpu/command_buffer/client/client_test_helper.h
@@ -21,6 +21,7 @@
 #include "gpu/command_buffer/service/command_buffer_service.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/latency/latency_info.h"
 
 namespace gpu {
 
@@ -119,6 +120,7 @@ class MockClientGpuControl : public GpuControl {
                                      const base::Closure& callback));
   MOCK_METHOD1(WaitSyncTokenHint, void(const SyncToken&));
   MOCK_METHOD1(CanWaitUnverifiedSyncToken, bool(const SyncToken&));
+  MOCK_METHOD1(AddLatencyInfo, void(const std::vector<ui::LatencyInfo>&));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockClientGpuControl);