CREDENTIAL: Do type checks for credential constructors.

third_party/WebKit/Source/modules/credentialmanager/FederatedCredential.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/credentialmanager/FederatedCredential.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "modules/credentialmanager/FederatedCredentialData.h"
 #include "platform/credentialmanager/PlatformFederatedCredential.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/WebFederatedCredential.h"
 
 namespace blink {
 
 FederatedCredential* FederatedCredential::create(WebFederatedCredential* webFederatedCredential)
 {
     return new FederatedCredential(webFederatedCredential);
 }
 
 FederatedCredential* FederatedCredential::create(const FederatedCredentialData& data, ExceptionState& exceptionState)
 {
+    if (data.id().isEmpty()) {
+        exceptionState.throwTypeError("'id' must not be empty.");
+        return nullptr;
+    }
+    if (data.provider().isEmpty()) {
+        exceptionState.throwTypeError("'provider' must not be empty.");
+        return nullptr;
+    }
+
     KURL iconURL = parseStringAsURL(data.iconURL(), exceptionState);
     KURL providerURL = parseStringAsURL(data.provider(), exceptionState);
     if (exceptionState.hadException())
         return nullptr;
     return new FederatedCredential(data.id(), providerURL, data.name(), iconURL);
 }
 
 FederatedCredential::FederatedCredential(WebFederatedCredential* webFederatedCredential)
     : Credential(webFederatedCredential->platformCredential())
 {
 }
 
 FederatedCredential::FederatedCredential(const String& id, const KURL& provider, const String& name, const KURL& icon)
     : Credential(PlatformFederatedCredential::create(id, SecurityOrigin::create(provider), name, icon))
 {
 }
 
 const String FederatedCredential::provider() const
 {
     return static_cast<PlatformFederatedCredential*>(m_platformCredential.get())->provider()->toString();
 }
 
 } // namespace blink