Implement unregisterProtocolHandler() function on CUSTOM_SCHEME_HANDLER

public/web/WebRuntimeFeatures.h

Index: public/web/WebRuntimeFeatures.h
diff --git a/public/web/WebRuntimeFeatures.h b/public/web/WebRuntimeFeatures.h
index af54f705a9987f6f7130887a48f0051ff29ef9f9..8afb89d4b16b377e64d359acbd8c4abb8d73b98b 100644
--- a/public/web/WebRuntimeFeatures.h
+++ b/public/web/WebRuntimeFeatures.h
@@ -140,6 +140,9 @@ public:
     WEBKIT_EXPORT static void enableHTMLImports(bool);
     WEBKIT_EXPORT static bool isHTMLImportsEnabled();
 
+    WEBKIT_EXPORT static void enableCustomSchemeHandler(bool);
+    WEBKIT_EXPORT static bool isCustomSchemeHandlerEnabled();

[abarth-chromium, 2013/08/21 17:10:19]

There is no need to expose this API separately.  It's covered by the omnibus
"experimental" API.

[gyuyoung-inactive, 2013/08/22 01:12:38]

I wonder if the "experimental" API is generated automatically, right ? Or,
should I do something for it ?

+
     // FIXME: Remove this when embedders switch to enableEmbedderCustomElements.
     WEBKIT_EXPORT static void enableCustomElements(bool);
     WEBKIT_EXPORT static void enableEmbedderCustomElements(bool);