[Media Router] MediaRouterUI + WebUI handler implementation.

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

 // Copyright 2015 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 CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_WEBUI_MESSAGE_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_WEBUI_MESSAGE_HANDLER_H_
 
+#include <vector>
+
 #include "base/macros.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 "content/public/browser/web_ui_message_handler.h"
 
 namespace base {
 class ListValue;
 }  // namespace base
 
 namespace media_router {
 
+class Issue;
+class MediaRoute;
 class MediaRouterUI;
 
 // The handler for Javascript messages related to the media router dialog.
 class MediaRouterWebUIMessageHandler : public content::WebUIMessageHandler {
  public:
   MediaRouterWebUIMessageHandler();
   ~MediaRouterWebUIMessageHandler() override;
 
+  // Methods to update the status displayed by the dialog.
+  void UpdateSinks(const std::vector<MediaSinkWithCastModes>& sinks);
+  void UpdateRoutes(const std::vector<MediaRoute>& routes);
+  void UpdateCastModes(const CastModeSet& cast_modes,
+                       const std::string& source_host);
+  void AddRoute(const MediaRoute& route);
+
+  // Does not take ownership of |issue|. Note that |issue| can be nullptr.

[Wez, 2015/05/21 22:58:37]

nit: Clarify _why_ |issue| may be nullptr.

[imcheng (use chromium acct), 2015/05/22 00:02:01]

Done.

+  void UpdateIssue(const Issue* issue);
+
+ private:
   // WebUIMessageHandler implementation.
   void RegisterMessages() override;
 
- private:
   // Handlers for JavaScript messages.
   void OnGetInitialSettings(const base::ListValue* args);
   void OnCreateRoute(const base::ListValue* args);
   void OnActOnIssue(const base::ListValue* args);
   void OnCloseRoute(const base::ListValue* args);
   void OnCloseDialog(const base::ListValue* args);
 
   // Helper function for getting a pointer to the corresponding MediaRouterUI.
   MediaRouterUI* GetMediaRouterUI() const;
 
   // Keeps track of whether a command to close the dialog has been issued.
   bool dialog_closing_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaRouterWebUIMessageHandler);
 };
 
 }  // namespace media_router
 
 #endif  // CHROME_BROWSER_UI_WEBUI_MEDIA_ROUTER_MEDIA_ROUTER_WEBUI_MESSAGE_HANDLER_H_