Remove a bunch of DeepCopy() calls in the chrome.storage API.

chrome/browser/extensions/api/storage/sync_storage_backend.h

Index: chrome/browser/extensions/api/storage/sync_storage_backend.h
diff --git a/chrome/browser/extensions/api/storage/sync_storage_backend.h b/chrome/browser/extensions/api/storage/sync_storage_backend.h
index 080fa8e7e3d9d9e8fcb27284f1ba91129909ea09..d5ca7f54fa8a698377dd62b09129a53a859ef043 100644
--- a/chrome/browser/extensions/api/storage/sync_storage_backend.h
+++ b/chrome/browser/extensions/api/storage/sync_storage_backend.h
@@ -67,7 +67,7 @@ class SyncStorageBackend : public syncer::SyncableService {
   // initializing sync with some initial data if sync enabled.
   SyncableSettingsStorage* GetOrCreateStorageWithSyncData(
       const std::string& extension_id,
-      const base::DictionaryValue& sync_data) const;
+      scoped_ptr<base::DictionaryValue> sync_data) const;
 
   // Gets all extension IDs known to extension settings.  This may not be all
   // installed extensions.