Split ExtensionTestObserver and move to //extensions.

chrome/browser/chromeos/login/signin/oauth2_browsertest.cc

Index: chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
diff --git a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
index c0cdb2e3d1cd8ce06bb6c7c19a62a85e0cb6986c..fc63af6085cfa812d1f5b787e188479a83336627 100644
--- a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
+++ b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <chrome/browser/extensions/chrome_extension_test_notification_observer.h>

[Devlin, 2016/10/11 22:53:45]

This doesn't belong here.

[Rahul Chaturvedi, 2016/10/12 20:25:53]

Eclipse screwup.
Fixed.

 #include <string>
 #include <utility>
 
@@ -765,7 +766,7 @@ IN_PROC_BROWSER_TEST_F(MergeSessionTest, XHRThrottle) {
 
   // Reset ExtensionBrowserTest::observer_ to the right browser object.
   Browser* browser = FindOrCreateVisibleBrowser(profile());
-  observer_.reset(new ExtensionTestNotificationObserver(browser));
+  observer_.reset(new ChromeExtensionTestNotificationObserver(browser));
 
   // Run background page tests. The tests will just wait for XHR request
   // to complete.