Parse /etc/lsb-release only once on ChromeOS

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

 // Copyright (c) 2013 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/chromeos/chrome_browser_main_chromeos.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ash_switches.h"
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/chromeos/chromeos_version.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/linux_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
+#include "base/sys_info.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_process_platform_part_chromeos.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_launch_error.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
 #include "chrome/browser/chromeos/boot_times_loader.h"
 #include "chrome/browser/chromeos/contacts/contact_manager.h"
 #include "chrome/browser/chromeos/dbus/cros_dbus_service.h"
@@ skipping 347 matching lines @@
     }
     LOG(INFO) << "Running as stub user with profile dir: "
               << singleton_command_line->GetSwitchValuePath(
                   switches::kLoginProfile).value();
   }
 
   // Initialize the statistics provider, which will ensure that the Chrome
   // channel info is read and made available early.
   system::StatisticsProvider::GetInstance()->Init();
 
+#if defined(GOOGLE_CHROME_BUILD)
+  const char kChromeOSReleaseTrack[] = "CHROMEOS_RELEASE_TRACK";
+  std::string channel;
+  if (base::SysInfo::GetLsbReleaseValue(kChromeOSReleaseTrack, &channel))
+    chrome::VersionInfo::SetChannel(channel);
+#endif
+
   ChromeBrowserMainPartsLinux::PreEarlyInitialization();
 }
 
 void ChromeBrowserMainPartsChromeos::PreMainMessageLoopStart() {
   // Replace the default NetworkChangeNotifierFactory with ChromeOS specific
   // implementation. This must be done before BrowserMainLoop calls
   // net::NetworkChangeNotifier::Create() in MainMessageLoopStart().
   net::NetworkChangeNotifier::SetFactory(
       new NetworkChangeNotifierFactoryChromeos());
   ChromeBrowserMainPartsLinux::PreMainMessageLoopStart();
@@ skipping 381 matching lines @@
 
   // Destroy DeviceSettingsService after g_browser_process.
   DeviceSettingsService::Shutdown();
 }
 
 void ChromeBrowserMainPartsChromeos::SetupPlatformFieldTrials() {
   default_pinned_apps_field_trial::SetupTrial();
 }
 
 }  //  namespace chromeos