[SystemInfo API] Rewrite storage info provider using storage monitor impl.

chrome/common/extensions/api/experimental_system_info_storage.idl

Index: chrome/common/extensions/api/experimental_system_info_storage.idl
diff --git a/chrome/common/extensions/api/experimental_system_info_storage.idl b/chrome/common/extensions/api/experimental_system_info_storage.idl
index 85ad8983ca1099def8e89b38125df0ee404331c8..b0f9ff1040ba52f9c82ec5620ae3fe703d397ea1 100644
--- a/chrome/common/extensions/api/experimental_system_info_storage.idl
+++ b/chrome/common/extensions/api/experimental_system_info_storage.idl
@@ -16,18 +16,22 @@ namespace experimental.systemInfo.storage {
   };
 
   dictionary StorageUnitInfo {
-    // The unique id of the storage unit.
+    // The unique storage id. It will use the transient ID.
     DOMString id;
+    // The name of the storage unit.
+    DOMString name;
     // The media type of the storage unit.
     StorageUnitType type;
     // The total amount of the storage space, in bytes.
+    // Default value is 0 if query operation failes.

[Jeffrey Yasskin, 2013/07/03 21:44:49]

sp: failes->fails

[Haojian Wu, 2013/07/04 00:41:17]

Done.

     double capacity;
     // The available amount of the storage space, in bytes.
+    // Default value is 0 if query operation failes.
     double availableCapacity;
   };
 
-  dictionary StorageChangeInfo {
-    // The uniue id of the storage unit already changed.
+  dictionary StorageFreeSpaceChangeInfo {
+    // The transient id of the storage unit already changed.

[Jeffrey Yasskin, 2013/07/03 21:44:49]

Comments here end up in user-visible documentation
(http://developer.chrome.com/dev/extensions/experimental.systemInfo.storage.ht...),
so "transient" isn't quite right. I'd leave this comment alone until someone has
time to actually rewrite it.

     DOMString id;
     // The new value of the available capacity.
     double availableCapacity;
@@ -67,7 +71,7 @@ namespace experimental.systemInfo.storage {
   interface Events {
     // Fired when the storage device available capacity is changed.
     // |info|: The changed information for the specified storage unit.
-    static void onAvailableCapacityChanged(StorageChangeInfo info);
+    static void onAvailableCapacityChanged(StorageFreeSpaceChangeInfo info);
 
     // Fired when a new removable storage is attached to the system.
     static void onAttached(StorageUnitInfo info);