Prepare chromium for WorkerThread migration to WebThread.

content/child/blink_platform_impl.cc

 // 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.
 
 #include "content/child/blink_platform_impl.h"
 
 #include <math.h>
 
 #include <vector>
 
@@ skipping 904 matching lines @@
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStarted(runLoop);
 }
 
 void BlinkPlatformImpl::didStopWorkerRunLoop(
     const blink::WebWorkerRunLoop& runLoop) {
   WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
   worker_task_runner->OnWorkerRunLoopStopped(runLoop);
 }
 
+void BlinkPlatformImpl::didStartWorkerThread(blink::WebThread* thread) {
+  WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
+  worker_task_runner->OnWorkerThreadStarted(thread);
+}
+
+void BlinkPlatformImpl::didStopWorkerThread(blink::WebThread* thread) {
+  WorkerTaskRunner* worker_task_runner = WorkerTaskRunner::Instance();
+  worker_task_runner->OnWorkerThreadStopped(thread);
+}
+
 blink::WebCrypto* BlinkPlatformImpl::crypto() {
   WebCryptoImpl::EnsureInit();
   return &web_crypto_;
 }
 
 
 WebThemeEngine* BlinkPlatformImpl::themeEngine() {
   return &native_theme_engine_;
 }
 
@@ skipping 178 matching lines @@
 }
 
 // static
 void BlinkPlatformImpl::DestroyCurrentThread(void* thread) {
   WebThreadImplForMessageLoop* impl =
       static_cast<WebThreadImplForMessageLoop*>(thread);
   delete impl;
 }
 
 }  // namespace content