Inside of content, prefer SiteInstanceImpl to SiteInstance.

content/browser/web_contents/web_contents_impl_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 945 matching lines @@
   orig_rfh->PrepareForCommit();
   contents()->TestDidNavigate(orig_rfh, 1, entry_id, true, url,
                               ui::PAGE_TRANSITION_TYPED);
 
   // Start to navigate first tab to a new site, so that it has a pending RVH.
   const GURL url2("http://www.yahoo.com");
   controller().LoadURL(
       url2, Referrer(), ui::PAGE_TRANSITION_TYPED, std::string());
   orig_rfh->PrepareForCommit();
   TestRenderFrameHost* pending_rfh = contents()->GetPendingMainFrame();
-  SiteInstance* instance = pending_rfh->GetSiteInstance();
+  SiteInstanceImpl* instance = pending_rfh->GetSiteInstance();
 
   // While it is still pending, simulate opening a new tab with the first tab
   // as its opener.  This will call CreateOpenerProxies on the opener to ensure
   // that an RVH exists.
   scoped_ptr<TestWebContents> popup(
       TestWebContents::Create(browser_context(), instance));
   popup->SetOpener(contents());
   contents()->GetRenderManager()->CreateOpenerProxies(instance, nullptr);
 
   // If swapped out is forbidden, a new proxy should be created for the opener
@@ skipping 2469 matching lines @@
   // An automatic navigation.
   contents()->GetMainFrame()->SendNavigateWithModificationCallback(
       2, 0, true, GURL(url::kAboutBlankURL), base::Bind(SetAsNonUserGesture));
 
   EXPECT_EQ(1u, delegate->reset_count());
 
   contents()->SetJavaScriptDialogManagerForTesting(nullptr);
 }
 
 }  // namespace content