Enforce handle ownership in base::Process

content/browser/browser_child_process_host_impl.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
 #define CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_
 
 #include <list>
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process/process.h"
 #include "base/synchronization/waitable_event_watcher.h"
 #include "content/browser/child_process_launcher.h"
 #include "content/browser/power_monitor_message_broadcaster.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/common/child_process_host_delegate.h"
 
+#if defined(OS_WIN)
+#include "base/win/object_watcher.h"
+#endif
+
 namespace base {
 class CommandLine;
 }
 
 namespace content {
 
 class BrowserChildProcessHostIterator;
 class BrowserChildProcessObserver;
 class BrowserMessageFilter;
 
 // Plugins/workers and other child processes that live on the IO thread use this
 // class. RenderProcessHostImpl is the main exception that doesn't use this
 /// class because it lives on the UI thread.
 class CONTENT_EXPORT BrowserChildProcessHostImpl
     : public BrowserChildProcessHost,
       public NON_EXPORTED_BASE(ChildProcessHostDelegate),
+#if defined(OS_WIN)
+      public base::win::ObjectWatcher::Delegate,
+#endif
       public ChildProcessLauncher::Client {
  public:
   BrowserChildProcessHostImpl(
       int process_type,
       BrowserChildProcessHostDelegate* delegate);
   virtual ~BrowserChildProcessHostImpl();
 
   // Terminates all child processes and deletes each BrowserChildProcessHost
   // instance.
   static void TerminateAll();
@@ skipping 47 matching lines @@
   static BrowserChildProcessList* GetIterator();
 
   static void AddObserver(BrowserChildProcessObserver* observer);
   static void RemoveObserver(BrowserChildProcessObserver* observer);
 
   // ChildProcessLauncher::Client implementation.
   virtual void OnProcessLaunched() override;
   virtual void OnProcessLaunchFailed() override;
 
 #if defined(OS_WIN)
-  void DeleteProcessWaitableEvent(base::WaitableEvent* event);
-  void OnProcessExitedEarly(base::WaitableEvent* event);
+  // ObjectWatcher::Delegate implementation.
+  void OnObjectSignaled(HANDLE object) override;
 #endif
 
   ChildProcessData data_;
   BrowserChildProcessHostDelegate* delegate_;
   scoped_ptr<ChildProcessHost> child_process_host_;
 
   scoped_ptr<ChildProcessLauncher> child_process_;
 
   PowerMonitorMessageBroadcaster power_monitor_message_broadcaster_;
 
 #if defined(OS_WIN)
   // Watches to see if the child process exits before the IPC channel has
   // been connected. Thereafter, its exit is determined by an error on the
   // IPC channel.
-  base::WaitableEventWatcher early_exit_watcher_;
+  base::win::ObjectWatcher early_exit_watcher_;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_CHILD_PROCESS_HOST_IMPL_H_