Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/extensions/extension_message_handler.cc

Index: chrome/browser/extensions/extension_message_handler.cc
diff --git a/chrome/browser/extensions/extension_message_handler.cc b/chrome/browser/extensions/extension_message_handler.cc
index 0ad400511aab1449254cfa634735e9471647acd6..502496255cd1935e7cf5fe3b5975aaad3aec3e78 100644
--- a/chrome/browser/extensions/extension_message_handler.cc
+++ b/chrome/browser/extensions/extension_message_handler.cc
@@ -31,13 +31,13 @@ bool ExtensionMessageHandler::OnMessageReceived(
 
 void ExtensionMessageHandler::RenderViewHostInitialized() {
   Send(new ExtensionMsg_NotifyRenderViewType(
-      routing_id(), render_view_host()->delegate()->GetRenderViewType()));
+      routing_id(), render_view_host()->GetDelegate()->GetRenderViewType()));
 }
 
 void ExtensionMessageHandler::OnPostMessage(int port_id,
                                             const std::string& message) {
   Profile* profile = Profile::FromBrowserContext(
-      render_view_host()->process()->GetBrowserContext());
+      render_view_host()->GetProcess()->GetBrowserContext());
   if (profile->GetExtensionMessageService()) {
     profile->GetExtensionMessageService()->PostMessageFromRenderer(
         port_id, message);