Use extensions::ResultCatcher; delete ExtensionApiTest::ResultCatcher.

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 ce9cb0e853c7b794c4216276b936c5926023a773..ade4e568d28ae65c30d21da8ecc1450e169fb576 100644
--- a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
+++ b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
@@ -34,6 +34,7 @@
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/browser_test_utils.h"
 #include "extensions/browser/process_manager.h"
+#include "extensions/test/result_catcher.h"
 #include "google_apis/gaia/gaia_constants.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "net/cookies/canonical_cookie.h"
@@ -745,7 +746,7 @@ IN_PROC_BROWSER_TEST_F(MergeSessionTest, XHRThrottle) {
 
   // Run background page tests. The tests will just wait for XHR request
   // to complete.
-  ResultCatcher catcher;
+  extensions::ResultCatcher catcher;
 
   scoped_ptr<ExtensionTestMessageListener> non_google_xhr_listener(
       new ExtensionTestMessageListener("non-google-xhr-received", false));