Prepare chromium for WorkerThread migration to 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 <math.h>
+
 #include "content/child/webthread_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/message_loop/message_loop.h"
 #include "base/pending_task.h"
 #include "base/threading/platform_thread.h"
 
 namespace content {
 
@@ skipping 63 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();
 }
 
+void WebThreadImpl::setSharedTimerFiredFunction(
+    SharedTimerFunction timerFunction) {
+  shared_timer_function_ = timerFunction;
+}
+
+void WebThreadImpl::setSharedTimerFireInterval(double interval_seconds) {
+  // See BlinkPlatformImpl::setSharedTimerFireInterval for explanation of
+  // why ceil is used in the interval calculation.
+  int64 interval = static_cast<int64>(
+      ceil(interval_seconds * base::Time::kMillisecondsPerSecond)
+      * base::Time::kMicrosecondsPerMillisecond);
+
+  if (interval < 0)
+    interval = 0;
+
+  shared_timer_.Stop();
+  shared_timer_.Start(FROM_HERE, base::TimeDelta::FromMicroseconds(interval),
+                      this, &WebThreadImpl::OnTimeout);
+}
+
+void WebThreadImpl::stopSharedTimer() {
+  shared_timer_.Stop();
+}
+
 WebThreadImpl::~WebThreadImpl() {
   thread_->Stop();
 }
 
 WebThreadImplForMessageLoop::WebThreadImplForMessageLoop(
     base::MessageLoopProxy* message_loop)
     : message_loop_(message_loop) {}
 
 void WebThreadImplForMessageLoop::postTask(Task* task) {
   message_loop_->PostTask(
@@ skipping 21 matching lines @@
   base::MessageLoop::current()->Quit();
 }
 
 bool WebThreadImplForMessageLoop::isCurrentThread() const {
   return message_loop_->BelongsToCurrentThread();
 }
 
 WebThreadImplForMessageLoop::~WebThreadImplForMessageLoop() {}
 
 }  // namespace content