Oilpan: have Console be on the heap by default.

Source/core/workers/WorkerConsole.h

Index: Source/core/workers/WorkerConsole.h
diff --git a/Source/core/workers/WorkerConsole.h b/Source/core/workers/WorkerConsole.h
index 2e9b1e64483ceb6eca4c7404c3d3f64a0f44c83f..ef1b8870c77eb3456c8fea04c5f451aefdb52e2f 100644
--- a/Source/core/workers/WorkerConsole.h
+++ b/Source/core/workers/WorkerConsole.h
@@ -47,9 +47,9 @@ class WorkerGlobalScope;
 class WorkerConsole final : public ConsoleBase {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<WorkerConsole> create(WorkerGlobalScope* scope)
+    static WorkerConsole* create(WorkerGlobalScope* scope)
     {
-        return adoptRefWillBeNoop(new WorkerConsole(scope));
+        return new WorkerConsole(scope);
     }
     virtual ~WorkerConsole();