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 719ffddf7a7fdd1e5f059eb93c536864b460066a..a26d7589d11c336ccc9f8b9406be16156bf7503e 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_;