Move ownership of ExtensionAction into ExtensionSystem.

ExtensionActions will be created by ExtensionActionManager during the
EXTENSION_LOADED notification and destroyed during EXTENSION_UNLOADED.  In this
change, the ExtensionActionManager inserts pointers to the ExtensionActions into
their Extension, but those pointers will go away in the next refactoring step.

This is part of a 4-part refactoring to clean up ExtensionAction icon handling.
The subsequent parts are:
2) Change ExtensionAction accesses from using Extension::*action() to using
   ExtensionSystem.
3) Move ExtensionAction from common/ to browser/
4) Make the icon-loading and -caching classes into ExtensionAction methods.

BUG=153463


Review URL: https://chromiumcodereview.appspot.com/11032013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@160677 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 54 insertions, 0 deletions

diff --git a/chrome/browser/extensions/extension_action_manager.h b/chrome/browser/extensions/extension_action_manager.h
new file mode 100644
index 0000000..4219dec
--- /dev/null
+++ b/chrome/browser/extensions/extension_action_manager.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2012 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_MANAGER_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_MANAGER_H_
+
+#include <map>
+#include <string>
+
+#include "base/memory/linked_ptr.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+
+class ExtensionAction;
+class Profile;
+
+namespace extensions {
+
+class Extension;
+
+// Owns the ExtensionActions associated with each extension.  These actions live
+// while an extension is loaded and are destroyed on unload.
+class ExtensionActionManager : public content::NotificationObserver {
+ public:
+  explicit ExtensionActionManager(Profile* profile);
+  virtual ~ExtensionActionManager();
+
+  // Called during ExtensionSystem::Shutdown(), when the associated
+  // Profile is going to be destroyed.
+  void Shutdown();
+
+ private:
+  // Implement content::NotificationObserver.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  Profile* const profile_;
+  content::NotificationRegistrar registrar_;
+
+  // Keyed by Extension ID.  These maps are populated when the extension is
+  // loaded, and the entries are removed when the extension is unloaded.  Not
+  // every extension has a page action or browser action, but all have a script
+  // badge.
+  typedef std::map<std::string, linked_ptr<ExtensionAction> > ExtIdToActionMap;
+  ExtIdToActionMap page_actions_;
+  ExtIdToActionMap browser_actions_;
+  ExtIdToActionMap script_badges_;
+};
+
+}
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ACTION_MANAGER_H_