Move the ProcessWatcher methods out of content/common/process_watcher into base/process_util, alo...

content/common/process_watcher_win.cc

-// Copyright (c) 2011 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/common/process_watcher.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
-#include "base/process_util.h"
-#include "base/win/object_watcher.h"
-#include "content/public/common/result_codes.h"
-
-// Maximum amount of time (in milliseconds) to wait for the process to exit.
-static const int kWaitInterval = 2000;
-
-namespace {
-
-class TimerExpiredTask : public Task,
-                         public base::win::ObjectWatcher::Delegate {
- public:
-  explicit TimerExpiredTask(base::ProcessHandle process) : process_(process) {
-    watcher_.StartWatching(process_, this);
-  }
-
-  virtual ~TimerExpiredTask() {
-    if (process_) {
-      KillProcess();
-      DCHECK(!process_) << "Make sure to close the handle.";
-    }
-  }
-
-  // Task ---------------------------------------------------------------------
-
-  virtual void Run() {
-    if (process_)
-      KillProcess();
-  }
-
-  // MessageLoop::Watcher -----------------------------------------------------
-
-  virtual void OnObjectSignaled(HANDLE object) {
-    // When we're called from KillProcess, the ObjectWatcher may still be
-    // watching.  the process handle, so make sure it has stopped.
-    watcher_.StopWatching();
-
-    CloseHandle(process_);
-    process_ = NULL;
-  }
-
- private:
-  void KillProcess() {
-    // OK, time to get frisky.  We don't actually care when the process
-    // terminates.  We just care that it eventually terminates, and that's what
-    // TerminateProcess should do for us. Don't check for the result code since
-    // it fails quite often. This should be investigated eventually.
-    base::KillProcess(process_, content::RESULT_CODE_HUNG, false);
-
-    // Now, just cleanup as if the process exited normally.
-    OnObjectSignaled(process_);
-  }
-
-  // The process that we are watching.
-  base::ProcessHandle process_;
-
-  base::win::ObjectWatcher watcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(TimerExpiredTask);
-};
-
-}  // namespace
-
-// static
-void ProcessWatcher::EnsureProcessTerminated(base::ProcessHandle process) {
-  DCHECK(process != GetCurrentProcess());
-
-  // If already signaled, then we are done!
-  if (WaitForSingleObject(process, 0) == WAIT_OBJECT_0) {
-    CloseHandle(process);
-    return;
-  }
-
-  MessageLoop::current()->PostDelayedTask(FROM_HERE,
-                                          new TimerExpiredTask(process),
-                                          kWaitInterval);
-}