gpu: Allow waiting on sync tokens without sync token client.

gpu/command_buffer/service/gles2_cmd_decoder_passthrough.cc

 // Copyright (c) 2016 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/command_buffer/service/gles2_cmd_decoder_passthrough.h"
 
 #include "base/strings/string_split.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "ui/gl/gl_version_info.h"
@@ skipping 407 matching lines @@
 
 size_t GLES2DecoderPassthroughImpl::GetCreatedBackTextureCountForTest() {
   return 0;
 }
 
 void GLES2DecoderPassthroughImpl::SetFenceSyncReleaseCallback(
     const FenceSyncReleaseCallback& callback) {
   fence_sync_release_callback_ = callback;
 }
 
-void GLES2DecoderPassthroughImpl::SetWaitFenceSyncCallback(
-    const WaitFenceSyncCallback& callback) {
-  wait_fence_sync_callback_ = callback;
+void GLES2DecoderPassthroughImpl::SetWaitSyncTokenCallback(
+    const WaitSyncTokenCallback& callback) {
+  wait_sync_token_callback_ = callback;
 }
 
 void GLES2DecoderPassthroughImpl::SetDescheduleUntilFinishedCallback(
     const NoParamCallback& callback) {}
 
 void GLES2DecoderPassthroughImpl::SetRescheduleAfterFinishedCallback(
     const NoParamCallback& callback) {}
 
 gpu::gles2::QueryManager* GLES2DecoderPassthroughImpl::GetQueryManager() {
   return nullptr;
@@ skipping 418 matching lines @@
   }, /* NOLINT */
 
 const GLES2DecoderPassthroughImpl::CommandInfo
     GLES2DecoderPassthroughImpl::command_info[] = {
         GLES2_COMMAND_LIST(GLES2_CMD_OP)};
 
 #undef GLES2_CMD_OP
 
 }  // namespace gles2
 }  // namespace gpu