[MediaRouter] Moved the code useful for Android to MediaRouterDialogController

chrome/browser/media/android/router/media_router_dialog_controller_android.cc

Index: chrome/browser/media/android/router/media_router_dialog_controller_android.cc
diff --git a/chrome/browser/media/android/router/media_router_dialog_controller_android.cc b/chrome/browser/media/android/router/media_router_dialog_controller_android.cc
index 74943e480f8b0f31df3d94c235fd685691407e02..c836f611c0a2cacee9ad2814dbb94600c60d9305 100644
--- a/chrome/browser/media/android/router/media_router_dialog_controller_android.cc
+++ b/chrome/browser/media/android/router/media_router_dialog_controller_android.cc
@@ -26,7 +26,8 @@ MediaRouterDialogControllerAndroid::GetOrCreateForWebContents(
 }
 
 MediaRouterDialogControllerAndroid::MediaRouterDialogControllerAndroid(
-    WebContents* web_contents) {
+    WebContents* web_contents)
+    : MediaRouterDialogController(web_contents) {
   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 }
 
@@ -37,8 +38,18 @@ MediaRouterDialogControllerAndroid::~MediaRouterDialogControllerAndroid() {
 bool MediaRouterDialogControllerAndroid::ShowMediaRouterDialogForPresentation(
     scoped_ptr<CreatePresentationSessionRequest> request) {
   DCHECK(thread_checker_.CalledOnValidThread());
+  SetPresentationRequest(request.Pass());
+  ActivateInitiatorWebContents();
+  MediaRouterDialogController::CreateMediaRouterDialog();
   return false;
 }
 
+void MediaRouterDialogControllerAndroid::CloseMediaRouterDialog() {
+  MediaRouterDialogController::CloseMediaRouterDialog();
+}
+
+void MediaRouterDialogControllerAndroid::Reset() {
+}
+
 }  // namespace media_router