content/public/browser/browser_child_process_observer.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_OBSERVER_H_
   6 #define CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_OBSERVER_H_
   7
   8 #include "content/common/content_export.h"
   9
  10 namespace content {
  11
  12 struct ChildProcessData;
  13
  14 // An observer API implemented by classes which are interested
  15 // in browser child process events.
  16 class CONTENT_EXPORT BrowserChildProcessObserver {
  17  public:
  18   // Called when a child process host has connected to a child process.
  19   virtual void BrowserChildProcessHostConnected(const ChildProcessData& data) {}
  20
  21   // Called after a ChildProcessHost is disconnected from the child process.
  22   virtual void BrowserChildProcessHostDisconnected(
  23       const ChildProcessData& data) {}
  24
  25   // Called when a child process disappears unexpectedly as a result of a crash.
  26   virtual void BrowserChildProcessCrashed(const ChildProcessData& data) {}
  27
  28   // Called when an instance of a particular child is created in a page. If one
  29   // page contains several regions rendered by the same child, this will be
  30   // called once for each region during the page load.
  31   virtual void BrowserChildProcessInstanceCreated(
  32       const ChildProcessData& data) {}
  33
  34  protected:
  35   // The observer can be destroyed on any thread.
  36   virtual ~BrowserChildProcessObserver() {}
  37
  38   static void Add(BrowserChildProcessObserver* observer);
  39   static void Remove(BrowserChildProcessObserver* observer);
  40 };
  41
  42 }  // namespace content
  43
  44 #endif  // CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_OBSERVER_H_