Move about://-related constants from //content to //url

chrome/browser/guest_view/web_view/web_view_guest.cc

 // Copyright 2014 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 "chrome/browser/guest_view/web_view/web_view_guest.h"
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 1045 matching lines @@
 
 void WebViewGuest::NavigateGuest(const std::string& src) {
   GURL url = ResolveURL(src);
 
   // Do not allow navigating a guest to schemes other than known safe schemes.
   // This will block the embedder trying to load unwanted schemes, e.g.
   // chrome://settings.
   bool scheme_is_blocked =
       (!content::ChildProcessSecurityPolicy::GetInstance()->IsWebSafeScheme(
           url.scheme()) &&
-      !url.SchemeIs(content::kAboutScheme)) ||
+      !url.SchemeIs(url::kAboutScheme)) ||
       url.SchemeIs(url::kJavaScriptScheme);
   if (scheme_is_blocked || !url.is_valid()) {
     std::string error_type(net::ErrorToString(net::ERR_ABORTED));
     DCHECK(StartsWithASCII(error_type, "net::", true));
     error_type.erase(0, 5);
     LoadAbort(true /* is_top_level */, url, error_type);
     return;
   }
 
   GURL validated_url(url);
@@ skipping 338 matching lines @@
     bool allow,
     const std::string& user_input) {
   WebViewGuest* guest =
       WebViewGuest::From(embedder_render_process_id(), new_window_instance_id);
   if (!guest)
     return;
 
   if (!allow)
     guest->Destroy();
 }