Introducing gpu::CommandBufferId as a distinct, IdType<...>-based type.

gpu/gles2_conform_support/egl/display.cc

 // Copyright (c) 2012 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.
 
 #include "gpu/gles2_conform_support/egl/display.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
@@ skipping 340 matching lines @@
 }
 
 void Display::EnsureWorkVisible() {
   // This is only relevant for out-of-process command buffers.
 }
 
 gpu::CommandBufferNamespace Display::GetNamespaceID() const {
   return gpu::CommandBufferNamespace::IN_PROCESS;
 }
 
-uint64_t Display::GetCommandBufferID() const {
-  return 0;
+gpu::CommandBufferId Display::GetCommandBufferID() const {
+  return gpu::CommandBufferId();
 }
 
 int32_t Display::GetExtraCommandBufferData() const {
   return 0;
 }
 
 uint64_t Display::GenerateFenceSyncRelease() {
   return next_fence_sync_release_++;
 }
 
@@ skipping 12 matching lines @@
 void Display::SignalSyncToken(const gpu::SyncToken& sync_token,
                               const base::Closure& callback) {
   NOTIMPLEMENTED();
 }
 
 bool Display::CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) {
   return false;
 }
 
 }  // namespace egl