[Chromecast] Add CastWebContents

chromecast/browser/android/cast_content_window_android.h

 // Copyright 2016 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 CHROMECAST_BROWSER_ANDROID_CAST_CONTENT_WINDOW_ANDROID_H_
 #define CHROMECAST_BROWSER_ANDROID_CAST_CONTENT_WINDOW_ANDROID_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 20 matching lines @@
 
   ~CastContentWindowAndroid() override;
 
   // CastContentWindow implementation:
   void SetTransparent() override;
   void ShowWebContents(content::WebContents* web_contents) override;
   std::unique_ptr<content::WebContents> CreateWebContents(
       content::BrowserContext* browser_context) override;
 
   // content::WebContentsObserver implementation:
-  void DidFirstVisuallyNonEmptyPaint() override;
-  void MediaStartedPlaying(const MediaPlayerInfo& media_info,
-                           const MediaPlayerId& id) override;
-  void MediaStoppedPlaying(const MediaPlayerInfo& media_info,
-                           const MediaPlayerId& id) override;
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
 
   // Called through JNI.
   void OnActivityStopped(JNIEnv* env,
                          const base::android::JavaParamRef<jobject>& jcaller);
   void OnKeyDown(JNIEnv* env,
                  const base::android::JavaParamRef<jobject>& jcaller,
                  int keycode);
 
  private:
   friend class CastContentWindow;
 
   // This class should only be instantiated by CastContentWindow::Create.
   explicit CastContentWindowAndroid(CastContentWindow::Delegate* delegate);
 
   CastContentWindow::Delegate* const delegate_;
   bool transparent_;
   base::android::ScopedJavaGlobalRef<jobject> java_window_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentWindowAndroid);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_ANDROID_CAST_CONTENT_WINDOW_ANDROID_H_