Introduce unregisterProtocolHandler() and isProtocolHandlerRegistered() webview API

Source/web/AssertMatchingEnums.cpp

Index: Source/web/AssertMatchingEnums.cpp
diff --git a/Source/web/AssertMatchingEnums.cpp b/Source/web/AssertMatchingEnums.cpp
index add410d343553579a6fd2d85e877b2f0e2efbd73..bb6fdc3e1733b7268a6875446720eda8875c4db3 100755
--- a/Source/web/AssertMatchingEnums.cpp
+++ b/Source/web/AssertMatchingEnums.cpp
@@ -44,6 +44,7 @@
 #include "WebGeolocationPosition.h"
 #include "WebIconURL.h"
 #include "WebInputElement.h"
+#include "WebNavigatorContentUtilsClient.h"
 #include "WebNotificationPresenter.h"
 #include "WebPageVisibilityState.h"
 #include "WebSettings.h"
@@ -80,6 +81,7 @@
 #include "modules/indexeddb/IDBMetadata.h"
 #include "modules/indexeddb/IndexedDB.h"
 #include "modules/indexeddb/chromium/IDBFactoryBackendInterfaceChromium.h"
+#include "modules/navigatorcontentutils/NavigatorContentUtilsClient.h"
 #include "modules/notifications/NotificationClient.h"
 #include "modules/quota/StorageQuota.h"
 #include "modules/speech/SpeechRecognitionError.h"
@@ -645,6 +647,10 @@ COMPILE_ASSERT_MATCHING_ENUM(WebConsoleMessage::LevelWarning, WarningMessageLeve
 COMPILE_ASSERT_MATCHING_ENUM(WebConsoleMessage::LevelError, ErrorMessageLevel);
 COMPILE_ASSERT_MATCHING_ENUM(WebConsoleMessage::LevelInfo, InfoMessageLevel);
 
+COMPILE_ASSERT_MATCHING_ENUM(WebCustomHandlersNew, NavigatorContentUtilsClient::CustomHandlersNew);
+COMPILE_ASSERT_MATCHING_ENUM(WebCustomHandlersRegistered, NavigatorContentUtilsClient::CustomHandlersRegistered);
+COMPILE_ASSERT_MATCHING_ENUM(WebCustomHandlersDeclined, NavigatorContentUtilsClient::CustomHandlersDeclined);
+
 COMPILE_ASSERT_MATCHING_ENUM(WebTouchActionNone, TouchActionNone);
 COMPILE_ASSERT_MATCHING_ENUM(WebTouchActionAuto, TouchActionAuto);
 COMPILE_ASSERT_MATCHING_ENUM(WebTouchActionPanX, TouchActionPanX);