Use URLFetcher to download ChromeOS recovery image config file

chrome/browser/chromeos/chrome_browser_main_chromeos.cc

Index: chrome/browser/chromeos/chrome_browser_main_chromeos.cc
diff --git a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
index d710a69d04c5743a4e64710029a89067d6097b79..b3b54cb9eb1bf3e63756a6af0fab1dd6a8624dc4 100644
--- a/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
+++ b/chrome/browser/chromeos/chrome_browser_main_chromeos.cc
@@ -228,7 +228,6 @@ ChromeBrowserMainPartsChromeos::ChromeBrowserMainPartsChromeos(
 ChromeBrowserMainPartsChromeos::~ChromeBrowserMainPartsChromeos() {
   chromeos::ShutdownKioskModeScreensaver();
   cryptohome::AsyncMethodCaller::Shutdown();
-  chromeos::imageburner::BurnManager::Shutdown();
   chromeos::disks::DiskMountManager::Shutdown();
 
   // CrosLibrary is shut down before DBusThreadManager even though the former
@@ -290,7 +289,6 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopStart() {
   session_manager_observer_.reset(new chromeos::SessionManagerObserver);
 
   chromeos::disks::DiskMountManager::Initialize();
-  chromeos::imageburner::BurnManager::Initialize();
   cryptohome::AsyncMethodCaller::Initialize();
 
   // Initialize the network change notifier for Chrome OS. The network
@@ -326,6 +324,7 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopStart() {
 
 void ChromeBrowserMainPartsChromeos::PreMainMessageLoopRun() {
   chromeos::AudioHandler::Initialize();
+  chromeos::imageburner::BurnManager::Initialize();
 
   // Listen for system key events so that the user will be able to adjust the
   // volume on the login screen, if Chrome is running on Chrome OS
@@ -533,6 +532,7 @@ void ChromeBrowserMainPartsChromeos::PostMainMessageLoopRun() {
   // chromeos::SystemKeyEventListener::Shutdown() is always safe to call,
   // even if Initialize() wasn't called.
   chromeos::SystemKeyEventListener::Shutdown();
+  chromeos::imageburner::BurnManager::Shutdown();
   chromeos::AudioHandler::Shutdown();
 
   chromeos::WebSocketProxyController::Shutdown();