[Chromecast] Add input support.

chromecast/browser/cast_browser_main_parts.h

Index: chromecast/browser/cast_browser_main_parts.h
diff --git a/chromecast/browser/cast_browser_main_parts.h b/chromecast/browser/cast_browser_main_parts.h
index d60960472b4ea21bd601075112f6ed06c70f17d9..5600ed408b18bd548cf3bc00613ace9216526022 100644
--- a/chromecast/browser/cast_browser_main_parts.h
+++ b/chromecast/browser/cast_browser_main_parts.h
@@ -33,6 +33,7 @@ class VideoPlaneController;
 
 namespace shell {
 class CastBrowserProcess;
+class CastWindowManager;
 class URLRequestContextFactory;
 
 class CastBrowserMainParts : public content::BrowserMainParts {
@@ -67,6 +68,7 @@ class CastBrowserMainParts : public content::BrowserMainParts {
   std::unique_ptr<net::NetLog> net_log_;
   std::unique_ptr<media::VideoPlaneController> video_plane_controller_;
   std::unique_ptr<media::MediaCapsImpl> media_caps_;
+  std::unique_ptr<CastWindowManager> cast_window_manager_;
 
 #if !defined(OS_ANDROID)
   // CMA thread used by AudioManager, MojoRenderer, and MediaPipelineBackend.