Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/renderer_host/render_process_host_chrome_browsertest.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 "content/browser/renderer_host/render_process_host_browsertest.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/debugger/devtools_window.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 14 matching lines @@
     if (!render_process_host->HasConnection())
       continue;
     content::RenderProcessHost::listeners_iterator iter(
         render_process_host->ListenersIterator());
     for (; !iter.IsAtEnd(); iter.Advance()) {
       const RenderWidgetHost* widget =
           RenderWidgetHostImpl::FromIPCChannelListener(iter.GetCurrentValue());
       DCHECK(widget);
       if (!widget || !widget->IsRenderView())
         continue;
-      RenderViewHost* host = const_cast<RenderViewHost*>(
-          static_cast<const RenderViewHost*>(widget));
-      content::RenderViewHostDelegate* host_delegate = host->delegate();
+      RenderViewHost* host = static_cast<RenderViewHostImpl*>(
+          const_cast<RenderWidgetHost*>(widget)->AsRWHImpl());
+
+      content::RenderViewHostDelegate* host_delegate = host->GetDelegate();
       GURL url = host_delegate->GetURL();
       if (url.SchemeIs(chrome::kChromeDevToolsScheme))
         return host;
     }
   }
   return NULL;
 }
 
 }  // namespace
 
@@ skipping 64 matching lines @@
   RenderViewHost* devtools = FindFirstDevToolsHost();
   DCHECK(devtools);
 
   // DevTools start in a separate process.
   DevToolsWindow::ToggleDevToolsWindow(
       devtools, DEVTOOLS_TOGGLE_ACTION_INSPECT);
   host_count++;
   EXPECT_EQ(tab_count, browser()->tab_count());
   EXPECT_EQ(host_count, RenderProcessHostCount());
 }