Remove BrowserThread::UnsafeGetBrowserThread, add UnsafeGetMessageLoopForThread.

chrome/browser/chromeos/version_loader.cc

Index: chrome/browser/chromeos/version_loader.cc
diff --git a/chrome/browser/chromeos/version_loader.cc b/chrome/browser/chromeos/version_loader.cc
index 82d56c041371d82ab02b6c3a5eb005f647512f13..b3ea12f10afde22e140e66b29dabb1b14f974876 100644
--- a/chrome/browser/chromeos/version_loader.cc
+++ b/chrome/browser/chromeos/version_loader.cc
@@ -48,7 +48,7 @@ VersionLoader::Handle VersionLoader::GetVersion(
     CancelableRequestConsumerBase* consumer,
     const VersionLoader::GetVersionCallback& callback,
     VersionFormat format) {
-  if (!g_browser_process->file_thread()) {
+  if (!BrowserThread::IsMessageLoopValid(BrowserThread::FILE)) {
     // This should only happen if Chrome is shutting down, so we don't do
     // anything.
     return 0;
@@ -57,7 +57,8 @@ VersionLoader::Handle VersionLoader::GetVersion(
   scoped_refptr<GetVersionRequest> request(new GetVersionRequest(callback));
   AddRequest(request, consumer);
 
-  g_browser_process->file_thread()->message_loop()->PostTask(
+  BrowserThread::PostTask(
+      BrowserThread::FILE,
       FROM_HERE,
       NewRunnableMethod(backend_.get(), &Backend::GetVersion, request, format));
   return request->handle();
@@ -66,7 +67,7 @@ VersionLoader::Handle VersionLoader::GetVersion(
 VersionLoader::Handle VersionLoader::GetFirmware(
     CancelableRequestConsumerBase* consumer,
     const VersionLoader::GetFirmwareCallback& callback) {
-  if (!g_browser_process->file_thread()) {
+  if (!BrowserThread::IsMessageLoopValid(BrowserThread::FILE)) {
     // This should only happen if Chrome is shutting down, so we don't do
     // anything.
     return 0;
@@ -75,7 +76,8 @@ VersionLoader::Handle VersionLoader::GetFirmware(
   scoped_refptr<GetFirmwareRequest> request(new GetFirmwareRequest(callback));
   AddRequest(request, consumer);
 
-  g_browser_process->file_thread()->message_loop()->PostTask(
+  BrowserThread::PostTask(
+      BrowserThread::FILE,
       FROM_HERE,
       NewRunnableMethod(backend_.get(), &Backend::GetFirmware, request));
   return request->handle();