Enable MSVC warning for unused locals.

chrome/browser/search/suggestions/suggestions_source.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/search/suggestions/suggestions_source.h"
 
 #include <vector>
 
 #include "base/barrier_closure.h"
 #include "base/base64.h"
@@ skipping 98 matching lines @@
 
 SuggestionsSource::RequestContext::~RequestContext() {}
 
 std::string SuggestionsSource::GetSource() const {
   return chrome::kChromeUISuggestionsHost;
 }
 
 void SuggestionsSource::StartDataRequest(
     const std::string& path, int render_process_id, int render_frame_id,
     const content::URLDataSource::GotDataCallback& callback) {
-  SuggestionsServiceFactory* suggestions_service_factory =
-      SuggestionsServiceFactory::GetInstance();
-
   SuggestionsService* suggestions_service(
-      suggestions_service_factory->GetForProfile(profile_));
+      SuggestionsServiceFactory::GetInstance()->GetForProfile(profile_));
 
   if (!suggestions_service) {
     callback.Run(NULL);
     return;
   }
 
   // Since it's a debugging page, it's fine to specify that sync state is
   // initialized.
   suggestions_service->FetchSuggestionsData(
       INITIALIZED_ENABLED_HISTORY,
@@ skipping 59 matching lines @@
     std::string encoded_output;
     base::Base64Encode(std::string(output.begin(), output.end()),
                        &encoded_output);
     context->base64_encoded_pngs[url] = "data:image/png;base64,";
     context->base64_encoded_pngs[url] += encoded_output;
   }
   barrier.Run();
 }
 
 }  // namespace suggestions