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

chrome/browser/extensions/api/web_navigation/web_navigation_api.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.
 
 // Implements the Chrome Extensions WebNavigation API.
 
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 519 matching lines @@
   // When showing replacement content, we might get load signals for frames
   // that weren't reguarly loaded.
   if (!navigation_state_.IsValidFrame(frame_id))
     return;
   navigation_state_.SetNavigationCompleted(frame_id);
   if (!navigation_state_.CanSendEvents(frame_id))
     return;
   DCHECK(
       navigation_state_.GetUrl(frame_id) == validated_url ||
       (navigation_state_.GetUrl(frame_id) == GURL(content::kAboutSrcDocURL) &&
-       validated_url == GURL(content::kAboutBlankURL)))
+       validated_url == GURL(url::kAboutBlankURL)))
       << "validated URL is " << validated_url << " but we expected "
       << navigation_state_.GetUrl(frame_id);
   DCHECK_EQ(navigation_state_.IsMainFrame(frame_id), is_main_frame);
 
   // The load might already have finished by the time we finished parsing. For
   // compatibility reasons, we artifically delay the load completed signal until
   // after parsing was completed.
   if (!navigation_state_.GetParsingFinished(frame_id))
     return;
   helpers::DispatchOnCompleted(web_contents(),
@@ skipping 286 matching lines @@
 
 void WebNavigationAPI::OnListenerAdded(const EventListenerInfo& details) {
   web_navigation_event_router_.reset(new WebNavigationEventRouter(
       Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 #endif  // OS_ANDROID
 
 }  // namespace extensions