Improve IDB module's SecurityError messages.

Source/modules/navigatorcontentutils/NavigatorContentUtils.cpp

 /*
  * Copyright (C) 2011, Google Inc. All rights reserved.
  * Copyright (C) 2012, 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 met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 11 matching lines @@
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  * DAMAGE.
  */
 
 #include "config.h"
 #include "modules/navigatorcontentutils/NavigatorContentUtils.h"
 
 #if ENABLE(NAVIGATOR_CONTENT_UTILS)
 
+#include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/page/Frame.h"
 #include "core/page/Navigator.h"
 #include "core/page/Page.h"
 #include "wtf/HashSet.h"
 
 namespace WebCore {
 
@@ skipping 60 matching lines @@
         initProtocolHandlerWhitelist();
     return protocolWhitelist->contains(scheme);
 }
 
 static bool verifyProtocolHandlerScheme(const String& scheme, ExceptionState& es)
 {
     if (scheme.startsWith("web+")) {
         // The specification requires that the length of scheme is at least five characteres (including 'web+' prefix).
         if (scheme.length() >= 5 && isValidProtocol(scheme))
             return true;
-        es.throwDOMException(SecurityError);
+        if (scheme.length() < 5)
+            es.throwSecurityError(ExceptionMessages::failedToExecute("registerProtocolHandler", "Navigator", "the scheme length (including 'web+') must be at least 5 characters."));
+        else
+            es.throwSecurityError(ExceptionMessages::failedToExecute("registerProtocolHandler", "Navigator", "the scheme '" + scheme + "' may not be registered."));
         return false;
     }
 
     if (isProtocolWhitelisted(scheme))
         return true;
-    es.throwDOMException(SecurityError);
+    es.throwSecurityError(ExceptionMessages::failedToExecute("registerProtocolHandler", "Navigator", "the scheme '" + scheme + "' may not be registered."));
     return false;
 }
 
 NavigatorContentUtils* NavigatorContentUtils::from(Page* page)
 {
     return static_cast<NavigatorContentUtils*>(RefCountedSupplement<Page, NavigatorContentUtils>::from(page, NavigatorContentUtils::supplementName()));
 }
 
 NavigatorContentUtils::~NavigatorContentUtils()
 {
@@ skipping 88 matching lines @@
 
 void provideNavigatorContentUtilsTo(Page* page, NavigatorContentUtilsClient* client)
 {
     RefCountedSupplement<Page, NavigatorContentUtils>::provideTo(page, NavigatorContentUtils::supplementName(), NavigatorContentUtils::create(client));
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(NAVIGATOR_CONTENT_UTILS)