Remove calls to HandleScope default ctor.

Source/web/WebDevToolsFrontendImpl.cpp

Index: Source/web/WebDevToolsFrontendImpl.cpp
diff --git a/Source/web/WebDevToolsFrontendImpl.cpp b/Source/web/WebDevToolsFrontendImpl.cpp
index 3e06f914e32ef9ff1e86b910c12bc87281e1a761..a27bfba3e7a3a1d015d1892f1ce52c59b910aa84 100644
--- a/Source/web/WebDevToolsFrontendImpl.cpp
+++ b/Source/web/WebDevToolsFrontendImpl.cpp
@@ -146,9 +146,11 @@ void WebDevToolsFrontendImpl::maybeDispatch(WebCore::Timer<WebDevToolsFrontendIm
 void WebDevToolsFrontendImpl::doDispatchOnInspectorFrontend(const WebString& message)
 {
     WebFrameImpl* frame = m_webViewImpl->mainFrameImpl();
-    v8::Isolate* isolate = v8::Isolate::GetCurrent();
-    v8::HandleScope scope;
-    v8::Handle<v8::Context> frameContext = frame->frame() ? frame->frame()->script()->currentWorldContext() : v8::Local<v8::Context>();
+    if (!frame->frame())
+        return;
+    v8::Isolate* isolate = frame->frame()->script()->isolate();
+    v8::HandleScope scope(isolate);
+    v8::Handle<v8::Context> frameContext = frame->frame()->script()->currentWorldContext();
     v8::Context::Scope contextScope(frameContext);
     v8::Handle<v8::Value> inspectorFrontendApiValue = frameContext->Global()->Get(v8::String::New("InspectorFrontendAPI"));
     if (!inspectorFrontendApiValue->IsObject())