Fixing wrong extension ID in Activity Log entries.

Source/bindings/v8/V8WindowShell.cpp

Index: Source/bindings/v8/V8WindowShell.cpp
diff --git a/Source/bindings/v8/V8WindowShell.cpp b/Source/bindings/v8/V8WindowShell.cpp
index 6511b9da2daafabe70158fb73ce2e616d9a05374..df146e8055ec03f507c2be3aa20125b4bd76c326 100644
--- a/Source/bindings/v8/V8WindowShell.cpp
+++ b/Source/bindings/v8/V8WindowShell.cpp
@@ -212,7 +212,9 @@ bool V8WindowShell::initialize()
             setInjectedScriptContextDebugId(context, m_frame->script().contextDebugId(mainWindow->context()));
     }
 
-    m_scriptState->perContextData()->setActivityLogger(V8DOMActivityLogger::activityLogger(m_world->worldId()));
+    m_scriptState->perContextData()->setActivityLogger(

[haraken, 2014/04/30 00:54:20]

It's mis-designed that ActivityLogger is cached on V8PerContextData.
ActivityLogger is associated with worlds, so it should be cached on
DOMWrapperWorld. Specifically, we want to remove
V8PerContextData::m_activityLogger and add DOMWrapperWorld::m_activityLogger.

Previously we couldn't do that for performance reasons
(DOMWrapperWorld::current(isolate)->activityLogger() was slow), but the
performance issue is now gone.

Would you mind making the change before adding more code about ActivityLogger?

+        V8DOMActivityLogger::activityLogger(m_world->worldId(),
+            m_frame->document() ? m_frame->document()->baseURI() : KURL()));
     if (!installDOMWindow()) {
         disposeContext(DoNotDetachGlobal);
         return false;