Extract minimal RenderViewHost interface for embedders, leaving

content/browser/tab_contents/navigation_controller_impl.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/tab_contents/navigation_controller_impl.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"  // Temporary
 #include "base/string_util.h"
@@ skipping 763 matching lines @@
       temp.append("_");
       if (entries_[i]->site_instance())
         temp.append(base::IntToString(entries_[i]->site_instance()->GetId()));
       else
         temp.append("N");
       if (entries_[i]->site_instance() != tab_contents_->GetSiteInstance())
         temp.append("x");
       temp.append(",");
     }
     GURL url(temp);
-    tab_contents_->GetRenderViewHost()->Send(new ViewMsg_TempCrashWithData(url));
+    static_cast<RenderViewHostImpl*>(
+        tab_contents_->GetRenderViewHost())->Send(
+            new ViewMsg_TempCrashWithData(url));
     return content::NAVIGATION_TYPE_NAV_IGNORE;
   }
   NavigationEntryImpl* existing_entry = entries_[existing_entry_index].get();
 
   if (!content::PageTransitionIsMainFrame(params.transition)) {
     // All manual subframes would get new IDs and were handled above, so we
     // know this is auto. Since the current page was found in the navigation
     // entry list, we're guaranteed to have a last committed entry.
     DCHECK(GetLastCommittedEntry());
     return content::NAVIGATION_TYPE_AUTO_SUBFRAME;
@@ skipping 619 matching lines @@
   for (int i = 0; i < max_index; i++) {
     // When cloning a tab, copy all entries except interstitial pages
     if (source.entries_[i].get()->GetPageType() !=
         content::PAGE_TYPE_INTERSTITIAL) {
       entries_.insert(entries_.begin() + insert_index++,
                       linked_ptr<NavigationEntryImpl>(
                           new NavigationEntryImpl(*source.entries_[i])));
     }
   }
 }