Bug 1462784 - Remove the STORAGE category. r=njn

This was used to label IndexedDB work and work in storage/mozStorage*.
I don't think this deserves its own category; categories are most useful for
the main thread, and most of the time-consuming database-related work happens
on helper threads. The main thread pieces are mostly for asynchronicity-
coordination and don't usually take up time.

This patch labels IndexedDB work as DOM instead (which is maybe debatable) and
the rest as OTHER.

MozReview-Commit-ID: 3UYhFFbi3Ry

--HG--
extra : rebase_source : 5c88dfd67274103de01fe44191f49776017738f9

dom/indexedDB/ActorsChild.cpp

@@ -731,7 +731,7 @@ DispatchErrorEvent(IDBRequest* aRequest,
   MOZ_ASSERT(NS_FAILED(aErrorCode));
   MOZ_ASSERT(NS_ERROR_GET_MODULE(aErrorCode) == NS_ERROR_MODULE_DOM_INDEXEDDB);
 
-  AUTO_PROFILER_LABEL("IndexedDB:DispatchErrorEvent", STORAGE);
+  AUTO_PROFILER_LABEL("IndexedDB:DispatchErrorEvent", DOM);
 
   RefPtr<IDBRequest> request = aRequest;
   RefPtr<IDBTransaction> transaction = aTransaction;
@@ -804,7 +804,7 @@ DispatchSuccessEvent(ResultHelper* aResultHelper,
 {
   MOZ_ASSERT(aResultHelper);
 
-  AUTO_PROFILER_LABEL("IndexedDB:DispatchSuccessEvent", STORAGE);
+  AUTO_PROFILER_LABEL("IndexedDB:DispatchSuccessEvent", DOM);
 
   RefPtr<IDBRequest> request = aResultHelper->Request();
   MOZ_ASSERT(request);