Introduce unregisterProtocolHandler() and isProtocolHandlerRegistered() webview API

public/web/WebNavigatorContentUtilsClient.h

Index: public/web/WebNavigatorContentUtilsClient.h
diff --git a/public/web/WebPageVisibilityState.h b/public/web/WebNavigatorContentUtilsClient.h
similarity index 82%
copy from public/web/WebPageVisibilityState.h
copy to public/web/WebNavigatorContentUtilsClient.h
index fe02afd42d3c962943ab58e9346e3727b9b218a7..17350bb46d511e967e5b303c1cc2df75a49cd4c6 100644
--- a/public/web/WebPageVisibilityState.h
+++ b/public/web/WebNavigatorContentUtilsClient.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2011 Google Inc. All rights reserved.
+ * Copyright (C) 2014, Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -28,17 +28,17 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef WebPageVisibilityState_h
-#define WebPageVisibilityState_h
+#ifndef WebNavigatorContentUtilsClient_h
+#define WebNavigatorContentUtilsClient_h
 
 namespace blink {
 
-// The following enum should be consistent with the PageVisibilityState enum
+// The following enum should be consistent with the CustomHandlersState enum
 // defined in WebCore.
-enum WebPageVisibilityState {
-    WebPageVisibilityStateVisible,
-    WebPageVisibilityStateHidden,
-    WebPageVisibilityStatePrerender,
+enum WebCustomHandlersState {
+    WebCustomHandlersNew,
+    WebCustomHandlersRegistered,
+    WebCustomHandlersDeclined
 };
 
 } // namespace blink