Make WebContentsObserver::web_contents() public

extensions/browser/guest_view/app_view/app_view_guest.cc

Index: extensions/browser/guest_view/app_view/app_view_guest.cc
diff --git a/extensions/browser/guest_view/app_view/app_view_guest.cc b/extensions/browser/guest_view/app_view/app_view_guest.cc
index 7232583d37c2d8b165ea607ff3f671efe972177e..d3a40ecd9c82571921d800778b3578556bdbf748 100644
--- a/extensions/browser/guest_view/app_view/app_view_guest.cc
+++ b/extensions/browser/guest_view/app_view/app_view_guest.cc
@@ -113,7 +113,7 @@ WindowController* AppViewGuest::GetExtensionWindowController() const {
 }
 
 content::WebContents* AppViewGuest::GetAssociatedWebContents() const {
-  return guest_web_contents();
+  return web_contents();
 }
 
 bool AppViewGuest::OnMessageReceived(const IPC::Message& message) {
@@ -127,8 +127,7 @@ bool AppViewGuest::OnMessageReceived(const IPC::Message& message) {
 
 bool AppViewGuest::HandleContextMenu(const content::ContextMenuParams& params) {
   if (app_view_guest_delegate_) {
-    return app_view_guest_delegate_->HandleContextMenu(guest_web_contents(),
-                                                       params);
+    return app_view_guest_delegate_->HandleContextMenu(web_contents(), params);
   }
   return false;
 }
@@ -203,7 +202,7 @@ void AppViewGuest::DidAttachToEmbedder() {
   // element. This means that the host element knows how to route input
   // events to the guest, and the guest knows how to get frames to the
   // embedder.
-  guest_web_contents()->GetController().LoadURL(
+  web_contents()->GetController().LoadURL(
       url_, content::Referrer(), content::PAGE_TRANSITION_LINK, std::string());
 }
 
@@ -213,8 +212,8 @@ void AppViewGuest::DidInitialize() {
 }
 
 void AppViewGuest::OnRequest(const ExtensionHostMsg_Request_Params& params) {
-  extension_function_dispatcher_->Dispatch(
-      params, guest_web_contents()->GetRenderViewHost());
+  extension_function_dispatcher_->Dispatch(params,
+                                           web_contents()->GetRenderViewHost());
 }
 
 void AppViewGuest::CompleteCreateWebContents(