Factor out AppLifetimeMonitor.

AppLifetimeMonitor listens to extension host notifications and observes
ShellWindowRegistry. It sends out notifications when:
- an app starts
- the first shell window opens
- the last shell window closes
- the app stops

BUG=

Review URL: https://chromiumcodereview.appspot.com/16412002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204487 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 8 deletions

diff --git a/apps/app_restore_service.h b/apps/app_restore_service.h
index 65d3de2..d4e605f 100644
--- a/apps/app_restore_service.h
+++ b/apps/app_restore_service.h
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 
+#include "apps/app_lifetime_monitor.h"
 #include "chrome/browser/extensions/shell_window_registry.h"
 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
 #include "content/public/browser/notification_observer.h"
@@ -24,7 +25,7 @@ namespace apps {
 // Tracks what apps need to be restarted when the browser restarts.
 class AppRestoreService : public BrowserContextKeyedService,
                           public content::NotificationObserver,
-                          public extensions::ShellWindowRegistry::Observer {
+                          public AppLifetimeMonitor::Observer {
  public:
   // Returns true if apps should be restored on the current platform, given
   // whether this new browser process launched due to a restart.
@@ -42,22 +43,25 @@ class AppRestoreService : public BrowserContextKeyedService,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
-  // extensions::ShellWindowRegistry::Observer.
-  virtual void OnShellWindowAdded(ShellWindow* shell_window) OVERRIDE;
-  virtual void OnShellWindowIconChanged(ShellWindow* shell_window) OVERRIDE;
-  virtual void OnShellWindowRemoved(ShellWindow* shell_window) OVERRIDE;
+  // AppLifetimeMonitor::Observer.
+  virtual void OnAppStart(Profile* profile, const std::string& app_id) OVERRIDE;
+  virtual void OnAppActivated(Profile* profile,
+                              const std::string& app_id) OVERRIDE;
+  virtual void OnAppDeactivated(Profile* profile,
+                                const std::string& app_id) OVERRIDE;
+  virtual void OnAppStop(Profile* profile, const std::string& app_id) OVERRIDE;
 
   // BrowserContextKeyedService.
   virtual void Shutdown() OVERRIDE;
 
   void RecordAppStart(const std::string& extension_id);
   void RecordAppStop(const std::string& extension_id);
-  void RecordIfAppHasWindows(const std::string& id);
+  void RecordAppActiveState(const std::string& id, bool is_active);
 
   void RestoreApp(const extensions::Extension* extension);
 
-  void StartObservingShellWindows();
-  void StopObservingShellWindows();
+  void StartObservingAppLifetime();
+  void StopObservingAppLifetime();
 
   content::NotificationRegistrar registrar_;
   Profile* profile_;