Impl mus::mojom::GpuService to enable using Chrome IPC version gpu CmdBuf in mus

content/renderer/mus/render_widget_mus_connection.cc

Index: content/renderer/mus/render_widget_mus_connection.cc
diff --git a/content/renderer/mus/render_widget_mus_connection.cc b/content/renderer/mus/render_widget_mus_connection.cc
index e293c43d3779e0d1e2894284c114e29216915a10..5e2cdff96a5d510fcd6d4f28172e83913bf5367d 100644
--- a/content/renderer/mus/render_widget_mus_connection.cc
+++ b/content/renderer/mus/render_widget_mus_connection.cc
@@ -13,7 +13,6 @@
 #include "components/mus/public/cpp/surfaces/surfaces_utils.h"
 #include "components/mus/public/interfaces/command_buffer.mojom.h"
 #include "components/mus/public/interfaces/compositor_frame.mojom.h"
-#include "components/mus/public/interfaces/gpu.mojom.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "content/public/common/mojo_shell_connection.h"
 #include "content/renderer/mus/compositor_mus_connection.h"
@@ -48,13 +47,9 @@ std::unique_ptr<cc::OutputSurface>
 RenderWidgetMusConnection::CreateOutputSurface() {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(!window_surface_binding_);
-  mus::mojom::GpuPtr gpu_service;
-  MojoShellConnection::Get()->GetConnector()->ConnectToInterface("mojo:mus",
-                                                                 &gpu_service);
-  mus::mojom::CommandBufferPtr cb;
-  gpu_service->CreateOffscreenGLES2Context(GetProxy(&cb));
   scoped_refptr<cc::ContextProvider> context_provider(
-      new mus::ContextProvider(cb.PassInterface().PassHandle()));
+      new mus::ContextProvider(MojoShellConnection::Get()->GetConnector()));
+
   std::unique_ptr<cc::OutputSurface> surface(new mus::OutputSurface(
       context_provider, mus::WindowSurface::Create(&window_surface_binding_)));
   if (compositor_mus_connection_) {