[Chromecast] Add CastWebContents

chromecast/browser/cast_content_window_linux.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_CAST_CONTENT_WINDOW_LINUX_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_LINUX_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "chromecast/browser/cast_content_window.h"
 #include "chromecast/graphics/cast_vsync_settings.h"
-#include "content/public/browser/web_contents_observer.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 
 namespace aura {
 class WindowTreeHost;
 }
 
 namespace content {
-class BrowserContext;
 class WebContents;
 }
 
 namespace chromecast {
 namespace shell {
 
 class CastContentWindowLinux : public CastContentWindow,
-                               public content::WebContentsObserver,
                                public CastVSyncSettings::Observer {
  public:
   // Removes the window from the screen.
   ~CastContentWindowLinux() 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;
 
   // CastVSyncSettings::Observer implementation:
   void OnVSyncIntervalChanged(base::TimeDelta interval) override;
 
  private:
   friend class CastContentWindow;
 
   // This class should only be instantiated by CastContentWindow::Create.
   CastContentWindowLinux();
 
 #if defined(USE_AURA)
   std::unique_ptr<aura::WindowTreeHost> window_tree_host_;
 #endif
   bool transparent_;
 
   DISALLOW_COPY_AND_ASSIGN(CastContentWindowLinux);
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_LINUX_H_