Extract ProcessManager from ExtensionSystem.

extensions/extensions.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 701 matching lines @@
         'browser/mojo/stash_backend.cc',
         'browser/mojo/stash_backend.h',
         'browser/notification_types.h',
         'browser/null_app_sorting.cc',
         'browser/null_app_sorting.h',
         'browser/pref_names.cc',
         'browser/pref_names.h',
         'browser/process_manager.cc',
         'browser/process_manager.h',
         'browser/process_manager_delegate.h',
+        'browser/process_manager_factory.cc',
+        'browser/process_manager_factory.h',
         'browser/process_manager_observer.h',
         'browser/process_map.cc',
         'browser/process_map.h',
         'browser/process_map_factory.cc',
         'browser/process_map_factory.h',
         'browser/quota_service.cc',
         'browser/quota_service.h',
         'browser/renderer_startup_helper.cc',
         'browser/renderer_startup_helper.h',
         'browser/runtime_data.cc',
@@ skipping 492 matching lines @@
       'conditions': [
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ]
 }