Begin to enable extension APIs in Extension Service Worker.

third_party/WebKit/public/web/WebScriptController.h

Index: third_party/WebKit/public/web/WebScriptController.h
diff --git a/third_party/WebKit/public/web/WebScriptController.h b/third_party/WebKit/public/web/WebScriptController.h
index 0f507544d612568a25b1864c3930355c5df6a2e7..3a6aac83ede4676d18ea50f9ed88b6019eba2125 100644
--- a/third_party/WebKit/public/web/WebScriptController.h
+++ b/third_party/WebKit/public/web/WebScriptController.h
@@ -45,6 +45,8 @@ public:
     // v8 contexts initialized after this call. Takes ownership of the
     // v8::Extension object passed.
     BLINK_EXPORT static void registerExtension(v8::Extension*);
+    // Same as registerExtension, but applies to Service Worker scripts.
+    BLINK_EXPORT static void registerExtensionForServiceWorkerScript(v8::Extension*);
 
 private:
     WebScriptController();