Revert "Merge 281715 "[Android WebView] Terminate execution of stuck JS ...""

android_webview/renderer/aw_execution_termination_filter.h

-// 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.
-
-#ifndef ANDROID_WEBVIEW_RENDERER_AW_EXECUTION_TERMINATION_FILTER_H_
-#define ANDROID_WEBVIEW_RENDERER_AW_EXECUTION_TERMINATION_FILTER_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "base/timer/timer.h"
-#include "ipc/message_filter.h"
-
-namespace base {
-class MessageLoopProxy;
-}
-
-namespace v8 {
-class Isolate;
-}
-
-namespace android_webview {
-
-// The purpose of AwExecutionTerminationFilter is to attempt to terminate
-// any JavaScript code that is stuck in a loop before doing a navigation
-// originating from a Andoird WebView URL loading functions.
-//
-// This is how it works. AwExecutionTerminationFilter is created on render
-// thread. It listens on IO thread for navigation requests coming from
-// AwContents.loadUrl calls. On each such a request, it posts a delayed
-// cancellable task on the IO thread's message loop and, at the same time, posts
-// a cancellation task on the render thread's message loop. If render thread
-// is not stuck, the cancellation task runs and cancels the delayed task.
-// Otherwise, the delayed task runs and terminates execution of JS code
-// from the IO thread.
-class AwExecutionTerminationFilter : public IPC::MessageFilter {
- public:
-  AwExecutionTerminationFilter(
-      const scoped_refptr<base::MessageLoopProxy>& io_message_loop,
-      const scoped_refptr<base::MessageLoopProxy>& main_message_loop);
-
-  void SetRenderThreadIsolate(v8::Isolate* isolate);
-
- private:
-  virtual ~AwExecutionTerminationFilter();
-
-  // IPC::MessageFilter methods.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-
-  void OnCheckRenderThreadResponsiveness();
-  void StopTimerOnMainThread();
-  void StopTimer();
-  void TerminateExecution();
-
-  const scoped_refptr<base::MessageLoopProxy> io_message_loop_;
-  const scoped_refptr<base::MessageLoopProxy> main_message_loop_;
-
-  v8::Isolate* render_thread_isolate_;
-  base::OneShotTimer<AwExecutionTerminationFilter> termination_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(AwExecutionTerminationFilter);
-};
-
-}  // namespace android_webview
-
-#endif  // ANDROID_WEBVIEW_RENDERER_AW_EXECUTION_TERMINATION_FILTER_H_