Replace some hard coded schemes with the constants in /url/url_constants.h.

content/child/web_url_loader_impl.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.
 
 // An implementation of WebURLLoader in terms of ResourceLoaderBridge.
 
 #include "content/child/web_url_loader_impl.h"
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
@@ skipping 642 matching lines @@
     } else {
       client_->didFinishLoading(
           loader_, (completion_time - TimeTicks()).InSecondsF(),
           total_transfer_size);
     }
   }
 }
 
 bool WebURLLoaderImpl::Context::CanHandleDataURLRequestLocally() const {
   GURL url = request_.url();
-  if (!url.SchemeIs("data"))
+  if (!url.SchemeIs(url::kDataScheme))
     return false;
 
   // The fast paths for data URL, Start() and HandleDataURL(), don't support
   // the downloadToFile option.
   if (request_.downloadToFile())
     return false;
 
   // Optimize for the case where we can handle a data URL locally.  We must
   // skip this for data URLs targetted at frames since those could trigger a
   // download.
@@ skipping 229 matching lines @@
                                          int intra_priority_value) {
   context_->DidChangePriority(new_priority, intra_priority_value);
 }
 
 bool WebURLLoaderImpl::attachThreadedDataReceiver(
     blink::WebThreadedDataReceiver* threaded_data_receiver) {
   return context_->AttachThreadedDataReceiver(threaded_data_receiver);
 }
 
 }  // namespace content