[Chromecast] Turn CastContentWindow into an abstract interface.

chromecast/browser/cast_content_window.h

 // Copyright 2014 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_H_
 #define CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_
 
 #include <memory>
 
 #include "base/macros.h"
-#include "chromecast/graphics/cast_vsync_settings.h"
-#include "content/public/browser/web_contents_observer.h"
-
-namespace aura {
-class WindowTreeHost;
-}
+#include "ui/events/event.h"
 
 namespace content {
 class BrowserContext;
 class WebContents;
 }
 
 namespace chromecast {
 namespace shell {
 
-class CastContentWindow : public content::WebContentsObserver,
-                          public CastVSyncSettings::Observer {
+// Class that represents the "window" a WebContents is displayed in cast_shell.
+// For Linux, this represents an Aura window. For Android, this is a Activity.
+// See CastContentWindowLinux and CastContentWindowAndroid.
+class CastContentWindow {
  public:
-  CastContentWindow();
+  class Delegate {
+   public:
+    virtual void OnWindowDestroyed() = 0;
+    virtual void OnKeyEvent(const ui::KeyEvent& key_event) = 0;
 
-  // Removes the window from the screen.
-  ~CastContentWindow() override;
+   protected:
+    virtual ~Delegate() {}
+  };
+
+  // Creates the platform specific CastContentWindow. |delegate| should outlive
+  // the created CastContentWindow.
+  static std::unique_ptr<CastContentWindow> Create(
+      CastContentWindow::Delegate* delegate);
+
+  virtual ~CastContentWindow() {}
 
   // Sets the window's background to be transparent (call before
   // CreateWindowTree).
-  void SetTransparent() { transparent_ = true; }
+  virtual void SetTransparent() = 0;
 
-  // Create a full-screen window for |web_contents|.
-  void CreateWindowTree(content::WebContents* web_contents);
+  // Creates a full-screen window for |web_contents| and display it.
+  // |web_contents| should outlive this CastContentWindow.
+  virtual void ShowWebContents(content::WebContents* web_contents) = 0;
 
-  std::unique_ptr<content::WebContents> CreateWebContents(
-      content::BrowserContext* browser_context);
-
-  // 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:
-#if defined(USE_AURA)
-  std::unique_ptr<aura::WindowTreeHost> window_tree_host_;
-#endif
-  bool transparent_;
-
-  DISALLOW_COPY_AND_ASSIGN(CastContentWindow);
+  // Creates a WebContents.
+  // TODO(derekjchow): remove this function from this class, since it doesn't
+  // have anything to do with displaying web_contents.
+  virtual std::unique_ptr<content::WebContents> CreateWebContents(
+      content::BrowserContext* browser_context) = 0;
 };
 
 }  // namespace shell
 }  // namespace chromecast
 
 #endif  // CHROMECAST_BROWSER_CAST_CONTENT_WINDOW_H_