Bug 1115812 patch 18 - We only need to call ProcessPendingRestyles recursively, rather than RebuildAllStyleData. r=heycam

If we discover that we've set mDoRebuildAllStyleData in the middle of
ProcessPendingRestyles(), now that ProcessPendingRestyles() fully
handles mDoRebuildAllStyleData, we only need to make a recursive call to
ProcessPendingRestyles, rather than calling RebuildAllStyleData to call
ProcessPendingRestyles.

layout/base/RestyleManager.cpp

@@ -1651,7 +1651,7 @@ RestyleManager::ProcessPendingRestyles()
     // We probably wasted a lot of work up above, but this seems safest
     // and it should be rarely used.
     // This might add us as a refresh observer again; that's ok.
-    RebuildAllStyleData(nsChangeHint(0), nsRestyleHint(0));
+    ProcessPendingRestyles();
   }
 }