gpu: Implement the new fence syncs in mojo command buffer.

components/mus/public/interfaces/command_buffer.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module mus.mojom;
 
 import "components/mus/public/interfaces/gpu_capabilities.mojom";
 import "ui/mojo/geometry/geometry.mojom";
 
 struct CommandBufferState {
   int32 num_entries;
   int32 get_offset;
   int32 put_offset;
   int32 token;
   int32 error;  // TODO(piman): enum
   int32 context_lost_reason;  // TODO(piman): enum
   uint32 generation;
 };
 
 interface CommandBufferSyncClient {
   // |capabilities| is null if |success| is false.
-  DidInitialize(bool success, GpuCapabilities? capabilities);
+  DidInitialize(bool success,
+                int32 command_buffer_namespace,
+                uint64 command_buffer_id,
+                GpuCapabilities? capabilities);
   DidMakeProgress(CommandBufferState state);
 };
 
 interface CommandBufferSyncPointClient {
   DidInsertSyncPoint(uint32 sync_point);
 };
 
 interface CommandBufferLostContextObserver {
   DidLoseContext(int32 context_lost_reason);
 };
@@ skipping 24 matching lines @@
   Echo() => ();
 
   CreateImage(int32 id,
               handle memory_handle,
               int32 type,
               mojo.Size size,
               int32 format,
               int32 internal_format);
   DestroyImage(int32 id);
 };