gpu: Move ContextProviderCommandBuffer into mus gpu client-lib.

content/browser/compositor/gpu_browser_compositor_output_surface.h

Index: content/browser/compositor/gpu_browser_compositor_output_surface.h
diff --git a/content/browser/compositor/gpu_browser_compositor_output_surface.h b/content/browser/compositor/gpu_browser_compositor_output_surface.h
index b6f2334f233347a4cfcc3f0f2c24fc7933957fb0..6bf62dbce91b5a28f09e27b32cecf07801845f6c 100644
--- a/content/browser/compositor/gpu_browser_compositor_output_surface.h
+++ b/content/browser/compositor/gpu_browser_compositor_output_surface.h
@@ -23,11 +23,11 @@ struct GpuProcessHostedCALayerTreeParamsMac;
 }
 
 namespace ui {
+class ContextProviderCommandBuffer;
 class LatencyInfo;
 }
 
 namespace content {
-class ContextProviderCommandBuffer;
 class ReflectorTexture;
 
 // Adapts a WebGraphicsContext3DCommandBufferImpl into a
@@ -37,7 +37,7 @@ class GpuBrowserCompositorOutputSurface
     : public BrowserCompositorOutputSurface {
  public:
   GpuBrowserCompositorOutputSurface(
-      scoped_refptr<ContextProviderCommandBuffer> context,
+      scoped_refptr<ui::ContextProviderCommandBuffer> context,
       const UpdateVSyncParametersCallback& update_vsync_parameters_callback,
       std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
           overlay_candidate_validator);