Add API function chrome.notifications.getAll

chrome/common/extensions/api/notifications.idl

Index: chrome/common/extensions/api/notifications.idl
diff --git a/chrome/common/extensions/api/notifications.idl b/chrome/common/extensions/api/notifications.idl
index ec8bf147c8f753c4ca8c029cbc974b98b60cf582..895d34ae54b2dabdf6b1a9d8a208f7ba8a1363e4 100644
--- a/chrome/common/extensions/api/notifications.idl
+++ b/chrome/common/extensions/api/notifications.idl
@@ -70,6 +70,8 @@ namespace notifications {
 
   callback ClearCallback = void (boolean wasCleared);
 
+  callback GetAllCallback = void (object notifications);
+
   interface Functions {
     // Creates and displays a notification having the contents in |options|,
     // identified by the id |notificationId|. If |notificationId| is empty,
@@ -92,6 +94,10 @@ namespace notifications {
     // corresponding notification. |callback| indicates whether a matching
     // notification existed.
     static void clear(DOMString notificationId, ClearCallback callback);
+
+    // |callback| is executed with the set of notification_ids currently in
+    // the system.
+    static void getAll(GetAllCallback callback);
   };
 
   interface Events {