Removes MessageLoop::TYPE_XXX where possible

chrome/browser/extensions/external_policy_loader_unittest.cc

Index: chrome/browser/extensions/external_policy_loader_unittest.cc
diff --git a/chrome/browser/extensions/external_policy_loader_unittest.cc b/chrome/browser/extensions/external_policy_loader_unittest.cc
index 8f70dbad6e2c264016f4d4592f7d8a92bcb69f72..de369419ff9b6d26874b3978d47d0ee7c95bc192 100644
--- a/chrome/browser/extensions/external_policy_loader_unittest.cc
+++ b/chrome/browser/extensions/external_policy_loader_unittest.cc
@@ -26,9 +26,7 @@ namespace extensions {
 
 class ExternalPolicyLoaderTest : public testing::Test {
  public:
-  ExternalPolicyLoaderTest()
-      : loop_(base::MessageLoop::TYPE_IO),
-        ui_thread_(BrowserThread::UI, &loop_) {
+  ExternalPolicyLoaderTest() : ui_thread_(BrowserThread::UI, &loop_) {
   }
 
   virtual ~ExternalPolicyLoaderTest() {}
@@ -36,7 +34,7 @@ class ExternalPolicyLoaderTest : public testing::Test {
  private:
   // We need these to satisfy BrowserThread::CurrentlyOn(BrowserThread::UI)
   // checks in ExternalProviderImpl.
-  base::MessageLoop loop_;
+  base::MessageLoopForIO loop_;
   content::TestBrowserThread ui_thread_;
 };