components: Cleanup class/struct fwd declarations

components/crash/content/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_CONTENT_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
 #define COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_
 
 #include <map>
 
 #include "base/android/application_status_listener.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/process/kill.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"
 #include "content/public/common/process_type.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
@@ skipping 63 matching lines @@
   base::FilePath crash_dump_dir_;
 
   static CrashDumpManager* instance_;
 
   DISALLOW_COPY_AND_ASSIGN(CrashDumpManager);
 };
 
 }  // namespace breakpad
 
 #endif  // COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_DUMP_MANAGER_ANDROID_H_