Set linux distro to CHROMEOS_RELEASE_DESCRIPTION on ChromeOS

chrome/browser/ui/webui/about_ui.cc

 // Copyright (c) 2012 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/ui/webui/about_ui.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 144 matching lines @@
 // ChromeOSAboutVersionHandler is responsible for loading the Chrome OS
 // version.
 // ChromeOSAboutVersionHandler handles deleting itself once the version has
 // been obtained and AboutUIHTMLSource notified.
 class ChromeOSAboutVersionHandler {
  public:
   ChromeOSAboutVersionHandler(AboutUIHTMLSource* source, int request_id);
 
   // Callback from chromeos::VersionLoader giving the version.
   void OnVersion(chromeos::VersionLoader::Handle handle,
-                 std::string version);
+                 const std::string& version);
 
  private:
   // Where the results are fed to.
   scoped_refptr<AboutUIHTMLSource> source_;
 
   // ID identifying the request.
   int request_id_;
 
   // Handles asynchronously loading the version.
   chromeos::VersionLoader loader_;
@@ skipping 1093 matching lines @@
     : source_(source),
       request_id_(request_id) {
   loader_.GetVersion(&consumer_,
                      base::Bind(&ChromeOSAboutVersionHandler::OnVersion,
                                 base::Unretained(this)),
                      chromeos::VersionLoader::VERSION_FULL);
 }
 
 void ChromeOSAboutVersionHandler::OnVersion(
     chromeos::VersionLoader::Handle handle,
-    std::string version) {
+    const std::string& version) {
   DictionaryValue localized_strings;
   localized_strings.SetString("os_version", version);
   source_->FinishDataRequest(AboutVersionStrings(
       &localized_strings, source_->profile()), request_id_);
 
   // CancelableRequestProvider isn't happy when it's deleted and servicing a
   // task, so we delay the deletion.
   MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 }
 
@@ skipping 106 matching lines @@
   ThemeSource* theme = new ThemeSource(profile);
   ChromeURLDataManager::AddDataSource(profile, theme);
 #endif
 
   ChromeURLDataManager::DataSource* source =
       new AboutUIHTMLSource(name, profile);
   if (source) {
     ChromeURLDataManager::AddDataSource(profile, source);
   }
 }