Extract minimal RenderViewHost interface for embedders, leaving

content/browser/renderer_host/render_view_host_browsertest.cc

Index: content/browser/renderer_host/render_view_host_browsertest.cc
diff --git a/content/browser/renderer_host/render_view_host_browsertest.cc b/content/browser/renderer_host/render_view_host_browsertest.cc
index e8c44df6bd9136da635397d2084b1c795896c464..a71cf226283f3024f42f6c5ab58a5a43ad059328 100644
--- a/content/browser/renderer_host/render_view_host_browsertest.cc
+++ b/content/browser/renderer_host/render_view_host_browsertest.cc
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -31,8 +31,8 @@ IN_PROC_BROWSER_TEST_F(RenderViewHostTest,
   GURL empty_url(test_server()->GetURL("files/empty.html"));
   ui_test_utils::NavigateToURL(browser(), empty_url);
 
-  RenderViewHost* rvh =
-      browser()->GetSelectedWebContents()->GetRenderViewHost();
+  RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
+      browser()->GetSelectedWebContents()->GetRenderViewHost());
 
   {
     Value* value = rvh->ExecuteJavascriptAndGetValue(string16(),