Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/extensions/extension_host.cc

Index: chrome/browser/extensions/extension_host.cc
diff --git a/chrome/browser/extensions/extension_host.cc b/chrome/browser/extensions/extension_host.cc
index 3eae9caeed0fee168fb07e0cf1e21629f1cfc0c0..988967482d65a6fd9b80cd7fdb47153d2851b74e 100644
--- a/chrome/browser/extensions/extension_host.cc
+++ b/chrome/browser/extensions/extension_host.cc
@@ -183,7 +183,7 @@ WebContents* ExtensionHost::GetAssociatedWebContents() const {
 }
 
 content::RenderProcessHost* ExtensionHost::render_process_host() const {
-  return render_view_host()->process();
+  return render_view_host()->GetProcess();
 }
 
 RenderViewHost* ExtensionHost::render_view_host() const {
@@ -473,7 +473,7 @@ void ExtensionHost::RenderViewCreated(RenderViewHost* render_view_host) {
   const Browser* browser = GetBrowser();
   if (browser) {
     render_view_host->Send(new ExtensionMsg_UpdateBrowserWindowId(
-        render_view_host->routing_id(),
+        render_view_host->GetRoutingID(),
         ExtensionTabUtil::GetWindowId(browser)));
   }
 }