Move some content url constants to /url.

chrome/browser/ui/cocoa/drag_util.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/ui/cocoa/drag_util.h"
 
 #include "base/files/file_path.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/common/url_constants.h"
@@ skipping 40 matching lines @@
 }  // namespace
 
 GURL GetFileURLFromDropData(id<NSDraggingInfo> info) {
   if ([[info draggingPasteboard] containsURLData]) {
     GURL url;
     ui::PopulateURLAndTitleFromPasteboard(&url,
                                           NULL,
                                           [info draggingPasteboard],
                                           YES);
 
-    if (url.SchemeIs(content::kFileScheme))
+    if (url.SchemeIs(url::kFileScheme))
       return url;
   }
   return GURL();
 }
 
 BOOL IsUnsupportedDropData(Profile* profile, id<NSDraggingInfo> info) {
   GURL url = GetFileURLFromDropData(info);
   if (!url.is_empty()) {
     // If dragging a file, only allow dropping supported file types (that the
     // web view can display).
     return !IsSupportedFileURL(profile, url);
   }
   return NO;
 }
 
 }  // namespace drag_util