Move "oauth2" manifest key parsing out of Extension class.

chrome/browser/extensions/api/identity/identity_apitest.cc

Index: chrome/browser/extensions/api/identity/identity_apitest.cc
===================================================================
--- chrome/browser/extensions/api/identity/identity_apitest.cc	(revision 177049)
+++ chrome/browser/extensions/api/identity/identity_apitest.cc	(working copy)
@@ -15,6 +15,9 @@
 #include "chrome/browser/ui/webui/signin/login_ui_service.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/extensions/api/identity/oauth2_manifest_handler.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest_handler.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
@@ -154,10 +157,12 @@
   // Helper to create an extension with specific OAuth2Info fields set.
   // |fields_to_set| should be computed by using fields of Oauth2Fields enum.
   const Extension* CreateExtension(int fields_to_set) {
+  extensions::ManifestHandler::Register(extension_manifest_keys::kOAuth2,
+                                        new extensions::OAuth2ManifestHandler);
     const Extension* ext = LoadExtension(
         test_data_dir_.AppendASCII("platform_apps/oauth2"));
-    Extension::OAuth2Info& oauth2_info = const_cast<Extension::OAuth2Info&>(
-        ext->oauth2_info());
+    extensions::OAuth2Info& oauth2_info = const_cast<extensions::OAuth2Info&>(
+        extensions::OAuth2Info::GetOAuth2Info(ext));
     if ((fields_to_set & CLIENT_ID) != 0)
       oauth2_info.client_id = "client1";
     if ((fields_to_set & SCOPES) != 0) {