Bind Window focus ability to the ExecutionContext instead of the process.

Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 958 matching lines @@
 
 void LocalDOMWindow::focus(ExecutionContext* context)
 {
     if (!frame())
         return;
 
     FrameHost* host = frame()->host();
     if (!host)
         return;
 
-    bool allowFocus = WindowFocusAllowedIndicator::windowFocusAllowed();
-    if (context) {
+    ASSERT(context);
+
+    bool allowFocus = context->isWindowFocusAllowed();
+    if (allowFocus) {
+        context->consumeWindowFocus();
+    } else {
         ASSERT(isMainThread());
-        Document* activeDocument = toDocument(context);
-        if (opener() && opener() != this && activeDocument->domWindow() == opener())
-            allowFocus = true;
+        allowFocus = opener() && (opener() != this) && (toDocument(context)->domWindow() == opener());
     }
 
     // If we're a top level window, bring the window to the front.
     if (frame()->isMainFrame() && allowFocus)
         host->chrome().focus();
 
-    if (!frame())
-        return;
-
     frame()->eventHandler().focusDocumentView();
 }
 
 void LocalDOMWindow::blur()
 {
 }
 
 void LocalDOMWindow::close(ExecutionContext* context)
 {
     if (!frame() || !frame()->isMainFrame())
@@ skipping 977 matching lines @@
     return m_frameObserver->frame();
 }
 
 v8::Handle<v8::Object> LocalDOMWindow::wrap(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     ASSERT_NOT_REACHED(); // LocalDOMWindow has [Custom=ToV8].
     return v8::Handle<v8::Object>();
 }
 
 } // namespace blink