[Presentation API] 1-UA presentation support + presenter APIs.

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
@@ skipping 244 matching lines @@
       'public/browser/plugin_service.h',
       'public/browser/plugin_service_filter.h',
       'public/browser/power_save_blocker.h',
       'public/browser/power_save_blocker_factory.h',
       'public/browser/presentation_screen_availability_listener.h',
       'public/browser/presentation_service_delegate.h',
       'public/browser/presentation_session.cc',
       'public/browser/presentation_session.h',
       'public/browser/presentation_session_message.cc',
       'public/browser/presentation_session_message.h',
+      'public/browser/presentation_session_state_observer.h',
       'public/browser/profiler_controller.h',
       'public/browser/profiler_subscriber.h',
       'public/browser/push_messaging_service.cc',
       'public/browser/push_messaging_service.h',
       'public/browser/quota_permission_context.h',
       'public/browser/readback_types.h',
       'public/browser/render_frame_host.h',
       'public/browser/render_process_host.h',
       'public/browser/render_process_host_factory.h',
       'public/browser/render_process_host_observer.h',
@@ skipping 1936 matching lines @@
       ],
     }],
     ['OS != "mac" and OS != "android"', {
       'sources!': [
         'browser/gpu/gpu_surface_tracker.cc',
         'browser/gpu/gpu_surface_tracker.h',
       ],
     }],
   ],
 }