Remove remaining use of the deprecated MessageLoopProxy

gin/v8_platform.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 "gin/public/v8_platform.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/threading/worker_pool.h"
@@ skipping 17 matching lines @@
 void V8Platform::CallOnBackgroundThread(
     v8::Task* task,
     v8::Platform::ExpectedRuntime expected_runtime) {
   base::WorkerPool::PostTask(
       FROM_HERE,
       base::Bind(&v8::Task::Run, base::Owned(task)),
       expected_runtime == v8::Platform::kLongRunningTask);
 }
 
 void V8Platform::CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) {
-  PerIsolateData::From(isolate)->message_loop_proxy()->PostTask(
+  PerIsolateData::From(isolate)->task_runner()->PostTask(
       FROM_HERE, base::Bind(&v8::Task::Run, base::Owned(task)));
 }
 
 double V8Platform::MonotonicallyIncreasingTime() {
   return base::TimeTicks::Now().ToInternalValue() /
       static_cast<double>(base::Time::kMicrosecondsPerSecond);
 }
 
 }  // namespace gin