Decoupling visibility states from webcontent, adding visibility management in ResourceManager

athena/content/app_activity.h

Index: athena/content/app_activity.h
diff --git a/athena/content/app_activity.h b/athena/content/app_activity.h
index 9bacf45b550324a5ceb6f8dcbbffb9740f4fa6fa..f141053491b9454da3a8e218e7c47dc9613fc684 100644
--- a/athena/content/app_activity.h
+++ b/athena/content/app_activity.h
@@ -28,7 +28,6 @@ class AppActivity : public Activity,
                     public content::WebContentsObserver {
  public:
   explicit AppActivity(const std::string& app_id);
-  virtual ~AppActivity();
 
   // Activity:
   virtual athena::ActivityViewModel* GetActivityViewModel() OVERRIDE;
@@ -48,19 +47,32 @@ class AppActivity : public Activity,
   virtual gfx::ImageSkia GetOverviewModeImage() OVERRIDE;
 
  protected:
-  // content::WebContentsObserver:
+  virtual ~AppActivity();
+
+ // content::WebContentsObserver:
   virtual void TitleWasSet(content::NavigationEntry* entry,
                            bool explicit_set) OVERRIDE;
   virtual void DidUpdateFaviconURL(
       const std::vector<content::FaviconURL>& candidates) OVERRIDE;
 
- protected:
   virtual content::WebContents* GetWebContents() = 0;
 
  private:
   // Register this activity with its application.
   void RegisterActivity();
 
+  // Make the content visible. This call should only be paired with
+  // MakeInvisible. Note: Upon start the content is visible.
+  // TODO(skuhne): If this can be combined with web_activity, move this into a
+  // separate class.
+  void MakeVisible();
+
+  // Make the content invisible. This call should only be paired with
+  // MakeVisible.
+  // TODO(skuhne): If this can be combined with web_activity, move this into a
+  // separate class.
+  void MakeInvisible();
+
   const std::string app_id_;
 
   views::WebView* web_view_;