Remove some WebContents::GetRenderViewHost() calls.

chrome/browser/printing/print_preview_dialog_controller_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 "chrome/browser/printing/print_preview_dialog_controller.h"
 
 #include <memory>
 #include <string>
 
 #include "chrome/browser/printing/print_preview_test.h"
@@ skipping 346 matching lines @@
 
   // Close |web_contents_1|'s tab
   int tab_1_index = tab_strip_model->GetIndexOfWebContents(web_contents_1);
   tab_strip_model->CloseWebContentsAt(tab_1_index, 0);
   EXPECT_EQ(1, tab_strip_model->count());
 
   // Simulate a crash of the render process host for |web_contents_2|. Print
   // preview controller should exit cleanly and not crash.
   content::MockRenderProcessHost* rph =
       static_cast<content::MockRenderProcessHost*>(
-          web_contents_2->GetRenderViewHost()->GetProcess());
+          web_contents_2->GetMainFrame()->GetProcess());
   rph->SimulateCrash();
 }
 }  // namespace printing