Convert ExtensionRegistry to a BrowserContextKeyedService

extensions/browser/extension_registry.cc

Index: extensions/browser/extension_registry.cc
diff --git a/extensions/browser/extension_registry.cc b/extensions/browser/extension_registry.cc
index 9391b400deaf3fe651bb99a5b2d796f950aae2e6..f4bd91e145bff6c4387b74ba7f35614de5a94651 100644
--- a/extensions/browser/extension_registry.cc
+++ b/extensions/browser/extension_registry.cc
@@ -4,11 +4,18 @@
 
 #include "extensions/browser/extension_registry.h"
 
+#include "extensions/browser/extension_registry_factory.h"
+
 namespace extensions {
 
 ExtensionRegistry::ExtensionRegistry() {}
 ExtensionRegistry::~ExtensionRegistry() {}
 
+// static
+ExtensionRegistry* ExtensionRegistry::Get(content::BrowserContext* context) {
+  return ExtensionRegistryFactory::GetForBrowserContext(context);
+}
+
 bool ExtensionRegistry::AddEnabled(
     const scoped_refptr<const Extension>& extension) {
   return enabled_extensions_.Insert(extension);
@@ -57,4 +64,9 @@ void ExtensionRegistry::SetDisabledModificationCallback(
   disabled_extensions_.set_modification_callback(callback);
 }
 
+void ExtensionRegistry::Shutdown() {
+  // Release references to all Extension objects in the sets.
+  ClearAll();
+}
+
 }  // namespace extensions