(Not for review) Dummy C++ side Custom Controls implementation

chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h

Index: chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h
diff --git a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h
index 327422dc33e32743d1d4306590178fb86445e463..022476c86bd905a985bc69f498cfda8b94564503 100644
--- a/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h
+++ b/chrome/browser/ui/webui/media_router/media_router_webui_message_handler.h
@@ -9,6 +9,7 @@
 
 #include "base/macros.h"
 #include "chrome/browser/media/router/issue.h"
+#include "chrome/browser/media/router/media_status.h"
 #include "chrome/browser/ui/webui/media_router/media_cast_mode.h"
 #include "chrome/browser/ui/webui/media_router/media_sink_with_cast_modes.h"
 #include "components/signin/core/browser/account_info.h"
@@ -55,6 +56,9 @@ class MediaRouterWebUIMessageHandler : public content::WebUIMessageHandler {
   // the browser window changes.
   void UpdateMaxDialogHeight(int height);
 
+  // Notifies the WebUI with an updated MediaStatus.
+  void UpdateMediaRouteStatus(const MediaStatus& status);
+
   void SetWebUIForTest(content::WebUI* webui);
   void set_incognito_for_test(bool incognito) { incognito_ = incognito; }
 
@@ -88,9 +92,18 @@ class MediaRouterWebUIMessageHandler : public content::WebUIMessageHandler {
   void OnReportSinkCount(const base::ListValue* args);
   void OnReportTimeToClickSink(const base::ListValue* args);
   void OnReportTimeToInitialActionClose(const base::ListValue* args);
+  void OnRouteDetailsClosed(const base::ListValue* args);
+  void OnRouteDetailsOpened(const base::ListValue* args);
   void OnSearchSinksAndCreateRoute(const base::ListValue* args);
   void OnInitialDataReceived(const base::ListValue* args);
 
+  // Handlers for JavaScript messages to control media routes.
+  void OnPlayRoute(const base::ListValue* args);
+  void OnPauseRoute(const base::ListValue* args);
+  void OnSeekRoute(const base::ListValue* args);
+  void OnSetRouteMute(const base::ListValue* args);
+  void OnSetRouteVolume(const base::ListValue* args);
+
   // Performs an action for an Issue of |type|.
   // |args| contains additional parameter that varies based on |type|.
   // Returns |true| if the action was successfully performed.