Turn components/crash into a layered component.

components/crash/browser/crash_dump_manager_android.h

-// Copyright 2013 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 COMPONENTS_CRASH_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
-#define COMPONENTS_CRASH_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
-
-#include <map>
-
-#include "base/files/file.h"
-#include "base/files/file_path.h"
-#include "base/process/process.h"
-#include "base/synchronization/lock.h"
-#include "content/public/browser/browser_child_process_observer.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-
-namespace content {
-class RenderProcessHost;
-}
-
-namespace breakpad {
-
-// This class manages the crash minidumps.
-// On Android, because of process isolation, each renderer process runs with a
-// different UID. As a result, we cannot generate the minidumps in the browser
-// (as the browser process does not have access to some system files for the
-// crashed process). So the minidump is generated in the renderer process.
-// Since the isolated process cannot open files, we provide it on creation with
-// a file descriptor where to write the minidump in the event of a crash.
-// This class creates these file descriptors and associates them with render
-// processes and take the appropriate action when the render process terminates.
-class CrashDumpManager : public content::BrowserChildProcessObserver,
-                         public content::NotificationObserver {
- public:
-  // The embedder should create a single instance of the CrashDumpManager.
-  static CrashDumpManager* GetInstance();
-
-  // Should be created on the UI thread.
-  explicit CrashDumpManager(const base::FilePath& crash_dump_dir);
-
-  ~CrashDumpManager() override;
-
-  // Returns a file that should be used to generate a minidump for the process
-  // |child_process_id|.
-  base::File CreateMinidumpFile(int child_process_id);
-
- private:
-  typedef std::map<int, base::FilePath> ChildProcessIDToMinidumpPath;
-
-  static void ProcessMinidump(const base::FilePath& minidump_path,
-                              base::ProcessHandle pid);
-
-  // content::BrowserChildProcessObserver implementation:
-  void BrowserChildProcessHostDisconnected(
-      const content::ChildProcessData& data) override;
-  void BrowserChildProcessCrashed(
-      const content::ChildProcessData& data,
-      int exit_code) override;
-
-  // NotificationObserver implementation:
-  void Observe(int type,
-               const content::NotificationSource& source,
-               const content::NotificationDetails& details) override;
-
-  // Called on child process exit (including crash).
-  void OnChildExit(int child_process_id, base::ProcessHandle pid);
-
-  content::NotificationRegistrar notification_registrar_;
-
-  // This map should only be accessed with its lock aquired as it is accessed
-  // from the PROCESS_LAUNCHER and UI threads.
-  base::Lock child_process_id_to_minidump_path_lock_;
-  ChildProcessIDToMinidumpPath child_process_id_to_minidump_path_;
-
-  base::FilePath crash_dump_dir_;
-
-  static CrashDumpManager* instance_;
-
-  DISALLOW_COPY_AND_ASSIGN(CrashDumpManager);
-};
-
-}  // namespace breakpad
-
-#endif  // COMPONENTS_CRASH_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_