Expose platform thread id on blink::WebThread

content/child/webthread_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.
 
 // An implementation of WebThread in terms of base::MessageLoop and
 // base::Thread
 
 #include "content/child/webthread_impl.h"
 
 #include "base/bind.h"
@@ skipping 70 matching lines @@
 void WebThreadImpl::exitRunLoop() {
   CHECK(isCurrentThread());
   CHECK(thread_->message_loop()->is_running());
   thread_->message_loop()->Quit();
 }
 
 bool WebThreadImpl::isCurrentThread() const {
   return thread_->thread_id() == base::PlatformThread::CurrentId();
 }
 
+blink::PlatformThreadId WebThreadImpl::threadId() const {
+  return thread_->thread_id();
+}
+
 WebThreadImpl::~WebThreadImpl() {
   thread_->Stop();
 }
 
 WebThreadImplForMessageLoop::WebThreadImplForMessageLoop(
     base::MessageLoopProxy* message_loop)
-    : message_loop_(message_loop) {}
+    : message_loop_(message_loop),
+      thread_id_(base::PlatformThread::CurrentId()) {}
 
 void WebThreadImplForMessageLoop::postTask(Task* task) {
   message_loop_->PostTask(
       FROM_HERE, base::Bind(&blink::WebThread::Task::run, base::Owned(task)));
 }
 
 void WebThreadImplForMessageLoop::postDelayedTask(Task* task,
                                                   long long delay_ms) {
   message_loop_->PostDelayedTask(
       FROM_HERE,
@@ skipping 11 matching lines @@
 void WebThreadImplForMessageLoop::exitRunLoop() {
   CHECK(isCurrentThread());
   CHECK(base::MessageLoop::current()->is_running());
   base::MessageLoop::current()->Quit();
 }
 
 bool WebThreadImplForMessageLoop::isCurrentThread() const {
   return message_loop_->BelongsToCurrentThread();
 }
 
+blink::PlatformThreadId WebThreadImplForMessageLoop::threadId() const {
+  return thread_id_;
+}
+
 WebThreadImplForMessageLoop::~WebThreadImplForMessageLoop() {}
 
 }  // namespace content