[MediaRouter] The minimal change to make everything build on Android.

chrome/browser/media/android/router/media_router_dialog_controller_android.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_MEDIA_ANDROID_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_ANDROID_H_
+#define CHROME_BROWSER_MEDIA_ANDROID_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_ANDROID_H_
+
+#include "base/macros.h"
+#include "chrome/browser/media/router/media_router_dialog_controller.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+namespace media_router {
+
+// Android implementation of the MediaRouterDialogController.
+class MediaRouterDialogControllerAndroid
+    : public content::WebContentsUserData<MediaRouterDialogControllerAndroid>,
+      public MediaRouterDialogController {
+ public:
+  ~MediaRouterDialogControllerAndroid() override;
+
+  static MediaRouterDialogControllerAndroid* GetOrCreateForWebContents(
+      content::WebContents* web_contents);
+
+  // MediaRouterDialogController implementation.
+  bool ShowMediaRouterDialogForPresentation(
+      scoped_ptr<CreatePresentationSessionRequest> request) override;
+
+ private:
+  friend class content::WebContentsUserData<MediaRouterDialogControllerAndroid>;
+
+  // Use MediaRouterDialogControllerAndroid::CreateForWebContents() to create an
+  // instance.
+  explicit MediaRouterDialogControllerAndroid(
+      content::WebContents* web_contents);
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaRouterDialogControllerAndroid);
+};
+
+}  // namespace media_router
+
+#endif  // CHROME_BROWSER_MEDIA_ANDROID_ROUTER_MEDIA_ROUTER_DIALOG_CONTROLLER_ANDROID_H_