[Extensions] Fix chrome url override settings

chrome/browser/extensions/extension_message_bubble_controller_unittest.cc

Index: chrome/browser/extensions/extension_message_bubble_controller_unittest.cc
diff --git a/chrome/browser/extensions/extension_message_bubble_controller_unittest.cc b/chrome/browser/extensions/extension_message_bubble_controller_unittest.cc
index 3b0555309cfd8e9411b249115879729fea7684f9..ce14e6ff792dcdf6e243f51b9d7fddd91762ef44 100644
--- a/chrome/browser/extensions/extension_message_bubble_controller_unittest.cc
+++ b/chrome/browser/extensions/extension_message_bubble_controller_unittest.cc
@@ -17,6 +17,7 @@
 #include "chrome/browser/extensions/dev_mode_bubble_delegate.h"
 #include "chrome/browser/extensions/extension_function_test_utils.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_web_ui_override_registrar.h"
 #include "chrome/browser/extensions/ntp_overridden_bubble_delegate.h"
 #include "chrome/browser/extensions/proxy_overridden_bubble_delegate.h"
 #include "chrome/browser/extensions/settings_api_bubble_delegate.h"
@@ -45,6 +46,12 @@ const char kId1[] = "iccfkkhkfiphcjdakkmcjmkfboccmndk";
 const char kId2[] = "ajjhifimiemdpmophmkkkcijegphclbl";
 const char kId3[] = "ioibbbfddncmmabjmpokikkeiofalaek";
 
+scoped_ptr<KeyedService> BuildOverrideRegistrar(
+    content::BrowserContext* context) {
+  return make_scoped_ptr(
+      new extensions::ExtensionWebUIOverrideRegistrar(context));
+}
+
 }  // namespace
 
 namespace extensions {
@@ -289,6 +296,11 @@ class ExtensionMessageBubbleTest : public BrowserWithTestWindowTest {
                                  base::FilePath(), false);
     service_ = ExtensionSystem::Get(profile())->extension_service();
     service_->Init();
+
+    extensions::ExtensionWebUIOverrideRegistrar::GetFactoryInstance()->
+        SetTestingFactory(profile(), &BuildOverrideRegistrar);
+    extensions::ExtensionWebUIOverrideRegistrar::GetFactoryInstance()->Get(
+        profile());
   }
 
   ~ExtensionMessageBubbleTest() override {}