Remove unused Isolate* parameters from toV8Context()

Source/core/inspector/InspectorOverlay.cpp

Index: Source/core/inspector/InspectorOverlay.cpp
diff --git a/Source/core/inspector/InspectorOverlay.cpp b/Source/core/inspector/InspectorOverlay.cpp
index 2edb6d97211d72b334a7df2966c02bdce1a44d4a..401864ad68f31a5e2bbcf62db5f630d28cc52c53 100644
--- a/Source/core/inspector/InspectorOverlay.cpp
+++ b/Source/core/inspector/InspectorOverlay.cpp
@@ -714,7 +714,7 @@ Page* InspectorOverlay::overlayPage()
     loader.load(FrameLoadRequest(0, blankURL(), SubstituteData(data, "text/html", "UTF-8", KURL(), ForceSynchronousLoad)));
     v8::Isolate* isolate = toIsolate(frame.get());
     v8::HandleScope handleScope(isolate);
-    v8::Handle<v8::Context> frameContext = toV8Context(isolate, frame.get(), DOMWrapperWorld::mainWorld());
+    v8::Handle<v8::Context> frameContext = toV8Context(frame.get(), DOMWrapperWorld::mainWorld());
     ASSERT(!frameContext.IsEmpty());
     v8::Context::Scope contextScope(frameContext);
     v8::Handle<v8::Object> global = frameContext->Global();