Adds test coverage for 521663

Source/web/tests/FrameTestHelpers.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 80 matching lines @@
 private:
     TestWebFrameClient* const m_client;
 };
 
 void pumpPendingRequests(WebFrame* frame)
 {
     Platform::current()->currentThread()->postTask(FROM_HERE, new ServeAsyncRequestsTask(testClientForFrame(frame)));
     Platform::current()->unitTestSupport()->enterRunLoop();
 }
 
-class LoadTask : public WebThread::Task {
-public:
-    LoadTask(WebFrame* frame, const WebURLRequest& request)
-        : m_frame(frame)
-        , m_request(request)
-    {
-    }
-
-    void run() override
-    {
-        m_frame->loadRequest(m_request);
-    }
-
-private:
-    WebFrame* const m_frame;
-    const WebURLRequest m_request;
-};
-
 class LoadHTMLStringTask : public WebThread::Task {
 public:
     LoadHTMLStringTask(WebFrame* frame, const std::string& html, const WebURL& baseURL)
         : m_frame(frame)
         , m_html(html)
         , m_baseURL(baseURL)
     {
     }
 
     void run() override
@@ skipping 208 matching lines @@
         m_frame->parent()->removeChild(m_frame);
     m_frame->close();
 }
 
 void TestWebViewClient::initializeLayerTreeView()
 {
     m_layerTreeView = adoptPtr(Platform::current()->unitTestSupport()->createLayerTreeViewForTesting());
     ASSERT(m_layerTreeView);
 }
 
+LoadTask::LoadTask(WebFrame* frame, const WebURLRequest& request)
+    : m_frame(frame)
+    , m_request(request)
+{
+}
+
+void LoadTask::run()
+{
+    m_frame->loadRequest(m_request);
+}
+
 } // namespace FrameTestHelpers
 } // namespace blink