WIP: Plumbing input event latency reporting through Mus GPU.

gpu/ipc/gl_in_process_context.cc

Index: gpu/ipc/gl_in_process_context.cc
diff --git a/gpu/ipc/gl_in_process_context.cc b/gpu/ipc/gl_in_process_context.cc
index c854913758b2131ee2c50ca3bb0d2a24deaf6494..f0163103954a36fc076369a9eac688123bc110a8 100644
--- a/gpu/ipc/gl_in_process_context.cc
+++ b/gpu/ipc/gl_in_process_context.cc
@@ -72,6 +72,7 @@ class GLInProcessContextImpl
       const gpu::InProcessCommandBuffer::UpdateVSyncParametersCallback&
           callback) override;
   void SetLock(base::Lock* lock) override;
+  InProcessCommandBuffer* GetInProcessCommandBuffer() override;
 
  private:
   void Destroy();
@@ -115,6 +116,10 @@ void GLInProcessContextImpl::SetLock(base::Lock* lock) {
   NOTREACHED();
 }
 
+InProcessCommandBuffer* GLInProcessContextImpl::GetInProcessCommandBuffer() {
+  return command_buffer_.get();
+}
+
 bool GLInProcessContextImpl::Initialize(
     scoped_refptr<gl::GLSurface> surface,
     bool is_offscreen,