Move StartsWith[ASCII] to base namespace.

ui/oobe/oobe_md_ui.cc

 // Copyright 2015 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 "base/strings/string_util.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "grit/oobe_resources.h"
 #include "grit/oobe_resources_map.h"
 #include "ui/oobe/declarations/oobe_web_ui_view.h"
 #include "ui/oobe/oobe_md_ui.h"
 
 namespace {
 
 void SetUpDataSource(content::WebUIDataSource* source) {
   source->SetJsonPath("strings.js");
   source->AddResourcePath("", IDR_OOBE_UI_HTML);
 
   // Add all resources defined in "oobe_resources.grd" file at once.
   const char prefix[] = "resources/";
   const size_t prefix_length = arraysize(prefix) - 1;
   for (size_t i = 0; i < kOobeResourcesSize; ++i) {
     std::string name = kOobeResources[i].name;
-    DCHECK(StartsWithASCII(name, prefix, true));
+    DCHECK(base::StartsWithASCII(name, prefix, true));
     source->AddResourcePath(name.substr(prefix_length),
                             kOobeResources[i].value);
   }
 }
 
 }  // namespace
 
 OobeMdUI::OobeMdUI(content::WebUI* web_ui, const std::string& host)
     : WebUIController(web_ui) {
   content::WebUIDataSource* source = content::WebUIDataSource::Create(host);
   SetUpDataSource(source);
 
   view_.reset(new gen::OobeWebUIView(web_ui));
   view_->Init();
   view_->SetUpDataSource(source);
 
   content::WebUIDataSource::Add(web_ui->GetWebContents()->GetBrowserContext(),
                                 source);
 }
 
 OobeMdUI::~OobeMdUI() {}