Add more string_util functions to base namespace.

extensions/renderer/dispatcher.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 "extensions/renderer/dispatcher.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/debug/alias.h"
@@ skipping 321 matching lines @@
   const Extension* extension =
       extensions_.GetExtensionOrAppByURL(effective_document_url);
 
   if (extension &&
       (extension->is_extension() || extension->is_platform_app())) {
     int resource_id = extension->is_platform_app() ? IDR_PLATFORM_APP_CSS
                                                    : IDR_EXTENSION_FONTS_CSS;
     std::string stylesheet = ResourceBundle::GetSharedInstance()
                                  .GetRawDataResource(resource_id)
                                  .as_string();
-    ReplaceFirstSubstringAfterOffset(
+    base::ReplaceFirstSubstringAfterOffset(
         &stylesheet, 0, "$FONTFAMILY", system_font_family_);
-    ReplaceFirstSubstringAfterOffset(
+    base::ReplaceFirstSubstringAfterOffset(
         &stylesheet, 0, "$FONTSIZE", system_font_size_);
 
     // Blink doesn't let us define an additional user agent stylesheet, so
     // we insert the default platform app or extension stylesheet into all
     // documents that are loaded in each app or extension.
     frame->document().insertStyleSheet(WebString::fromUTF8(stylesheet));
   }
 
   // If this is an extension options page, and the extension has opted into
   // using Chrome styles, then insert the Chrome extension stylesheet.
@@ skipping 1087 matching lines @@
   // The "guestViewDeny" module must always be loaded last. It registers
   // error-providing custom elements for the GuestView types that are not
   // available, and thus all of those types must have been checked and loaded
   // (or not loaded) beforehand.
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     module_system->Require("guestViewDeny");
   }
 }
 
 }  // namespace extensions