Have Frame::loader() return a reference

Source/web/WebHelperPluginImpl.cpp

 /*
  * Copyright (C) 2012 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 139 matching lines @@
     ASSERT(webView);
     m_webView = webView;
 
     return initializePage(pluginType, hostDocument);
 }
 
 void WebHelperPluginImpl::closeHelperPlugin()
 {
     if (m_page) {
         m_page->clearPageGroup();
-        m_page->mainFrame()->loader()->stopAllLoaders();
+        m_page->mainFrame()->loader().stopAllLoaders();
     }
 
     // We must destroy the page now in case the host page is being destroyed, in
     // which case some of the objects the page depends on may have been
     // destroyed by the time this->close() is called asynchronously.
     destroyPage();
 
     // m_widgetClient might be 0 because this widget might be already closed.
     if (m_widgetClient) {
         // closeWidgetSoon() will call this->close() later.
@@ skipping 45 matching lines @@
 
     m_page = adoptPtr(new Page(pageClients));
     ASSERT(!m_page->settings().isScriptEnabled());
     m_page->settings().setPluginsEnabled(true);
 
     m_webView->client()->initializeHelperPluginWebFrame(this);
 
     // The page's main frame was set in initializeFrame() as a result of the above call.
     Frame* frame = m_page->mainFrame();
     ASSERT(frame);
-    frame->loader()->forceSandboxFlags(SandboxAll & ~SandboxPlugins);
+    frame->loader().forceSandboxFlags(SandboxAll & ~SandboxPlugins);
     frame->setView(FrameView::create(frame));
     // No need to set a size or make it not transparent.
 
-    writeDocument(pluginType, hostDocument, frame->loader()->activeDocumentLoader());
+    writeDocument(pluginType, hostDocument, frame->loader().activeDocumentLoader());
 
     return true;
 }
 
 void WebHelperPluginImpl::destroyPage()
 {
     if (!m_page)
         return;
 
     if (m_page->mainFrame())
-        m_page->mainFrame()->loader()->frameDetached();
+        m_page->mainFrame()->loader().frameDetached();
 
     m_page.clear();
 }
 
 void WebHelperPluginImpl::layout()
 {
     PageWidgetDelegate::layout(m_page.get());
 }
 
 void WebHelperPluginImpl::setFocus(bool)
@@ skipping 16 matching lines @@
     // A WebHelperPluginImpl instance usually has two references.
     //  - One owned by the instance itself. It represents the visible widget.
     //  - One owned by the hosting element. It's released when the hosting
     //    element asks the WebHelperPluginImpl to close.
     // We need them because the closing operation is asynchronous and the widget
     // can be closed while the hosting element is unaware of it.
     return adoptRef(new WebHelperPluginImpl(client)).leakRef();
 }
 
 } // namespace WebKit