Make lost context and error message callbacks on GpuControl go to client

components/mus/gles2/command_buffer_local.cc

Index: components/mus/gles2/command_buffer_local.cc
diff --git a/components/mus/gles2/command_buffer_local.cc b/components/mus/gles2/command_buffer_local.cc
index 23a8fd1e50fdae5a3e34160fa76ca384c2e2174e..20f0756ddf4eba0e607ca85e1b5c767d7faf24cb 100644
--- a/components/mus/gles2/command_buffer_local.cc
+++ b/components/mus/gles2/command_buffer_local.cc
@@ -216,6 +216,12 @@ void CommandBufferLocal::DestroyTransferBuffer(int32_t id) {
                  base::Unretained(this), id));
 }
 
+void CommandBufferLocal::SetGpuControlClient(gpu::GpuControlClient*) {
+  // This implementation of GpuControl has no concept of losing the context
+  // (see IsGpuChannelLost), and no error messages, so we don't bother storing
+  // the client.
+}
+
 gpu::Capabilities CommandBufferLocal::GetCapabilities() {
   DCHECK(CalledOnValidThread());
   return capabilities_;