Drop V8RecursionScope dependency on ExecutionContext

Source/web/WebKit.cpp

Index: Source/web/WebKit.cpp
diff --git a/Source/web/WebKit.cpp b/Source/web/WebKit.cpp
index 370d6141528c28f16bf3a834d136dc11e9b2cf0f..4da28848c37838b5ae682570e0bf609c2fd96a0d 100644
--- a/Source/web/WebKit.cpp
+++ b/Source/web/WebKit.cpp
@@ -218,12 +218,14 @@ void shutdown()
         s_messageLoopInterruptor = 0;
     }
 
+    v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();
+    V8PerIsolateData::willBeDestroyed(isolate);
+
     // Detach the main thread before starting the shutdown sequence
     // so that the main thread won't get involved in a GC during the shutdown.
     ThreadState::detachMainThread();
 
-    v8::Isolate* isolate = V8PerIsolateData::mainThreadIsolate();
-    V8PerIsolateData::dispose(isolate);
+    V8PerIsolateData::destroy(isolate);
     isolate->Exit();
     isolate->Dispose();