Bug 1088900 - Parse console.group/groupCollapse for custom styling. r=baku

Process the arguments of "MethodGroup" and "MethodGroupCollapsed"
Use the result of ProcessArguments to compute the groupName so we can get
rid of the "%c" parts.

MozReview-Commit-ID: 5B2jqG5RoRj

--HG--
extra : rebase_source : 256ef1ffc80157751cb202cc163cb2ca42c7397a

dom/console/Console.cpp

@@ -1560,6 +1560,9 @@ Console::PopulateConsoleNotificationInTheTargetScope(JSContext* aCx,
     case MethodException:
     case MethodDebug:
     case MethodAssert:
+    case MethodGroup:
+    case MethodGroupCollapsed:
+    case MethodGroupEnd:
       event.mArguments.Construct();
       event.mStyles.Construct();
       if (NS_WARN_IF(!ProcessArguments(aCx, aArguments,
@@ -1581,7 +1584,7 @@ Console::PopulateConsoleNotificationInTheTargetScope(JSContext* aCx,
   if (aData->mMethodName == MethodGroup ||
       aData->mMethodName == MethodGroupCollapsed ||
       aData->mMethodName == MethodGroupEnd) {
-    ComposeGroupName(aCx, aArguments, event.mGroupName);
+    ComposeGroupName(aCx, event.mArguments.Value(), event.mGroupName);
   }
 
   else if (aData->mMethodName == MethodTime && !aArguments.IsEmpty()) {