Cleanup: Remove some unneeded string allocations.

chrome/browser/extensions/api/management/chrome_management_api_delegate.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/extensions/api/management/chrome_management_api_delegate.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/bookmark_app_helper.h"
 #include "chrome/browser/extensions/chrome_extension_function_details.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 182 matching lines @@
   ChromeAppForLinkDelegate() {}
   ~ChromeAppForLinkDelegate() override {}
 
   void OnFaviconForApp(
       extensions::ManagementGenerateAppForLinkFunction* function,
       content::BrowserContext* context,
       const std::string& title,
       const GURL& launch_url,
       const favicon_base::FaviconImageResult& image_result) {
     WebApplicationInfo web_app;
-    web_app.title = base::UTF8ToUTF16(std::string(title));
+    web_app.title = base::UTF8ToUTF16(title);
     web_app.app_url = launch_url;
 
     if (!image_result.image.IsEmpty()) {
       WebApplicationInfo::IconInfo icon;
       icon.data = image_result.image.AsBitmap();
       icon.width = icon.data.width();
       icon.height = icon.data.height();
       web_app.icons.push_back(icon);
     }
 
@@ skipping 166 matching lines @@
 
 GURL ChromeManagementAPIDelegate::GetIconURL(
     const extensions::Extension* extension,
     int icon_size,
     ExtensionIconSet::MatchType match,
     bool grayscale,
     bool* exists) const {
   return extensions::ExtensionIconSource::GetIconURL(extension, icon_size,
                                                      match, grayscale, exists);
 }