[Extensions] Fix chrome url override settings

chrome/browser/extensions/extension_web_ui_override_registrar.h

Index: chrome/browser/extensions/extension_web_ui_override_registrar.h
diff --git a/chrome/browser/extensions/extension_web_ui_override_registrar.h b/chrome/browser/extensions/extension_web_ui_override_registrar.h
index 892deb28996c8c6b4dd06646bfc5ac3e375e1674..4624bd8438dbece1c6bbca7fee95fa7cf95d2d8d 100644
--- a/chrome/browser/extensions/extension_web_ui_override_registrar.h
+++ b/chrome/browser/extensions/extension_web_ui_override_registrar.h
@@ -6,6 +6,7 @@
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_WEB_UI_OVERRIDE_REGISTRAR_H_
 
 #include "base/basictypes.h"
+#include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "extensions/browser/browser_context_keyed_api_factory.h"
 #include "extensions/browser/extension_registry_observer.h"
@@ -36,6 +37,11 @@ class ExtensionWebUIOverrideRegistrar : public BrowserContextKeyedAPI,
   void OnExtensionUnloaded(content::BrowserContext* browser_context,
                            const Extension* extension,
                            UnloadedExtensionInfo::Reason reason) override;
+  void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                              const Extension* extension,
+                              UninstallReason reason) override;
+
+  void OnExtensionSystemReady(content::BrowserContext* context);
 
   // BrowserContextKeyedAPI implementation.
   static const char* service_name() {
@@ -46,6 +52,8 @@ class ExtensionWebUIOverrideRegistrar : public BrowserContextKeyedAPI,
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
+  base::WeakPtrFactory<ExtensionWebUIOverrideRegistrar> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionWebUIOverrideRegistrar);
 };