Credential manager: Convert strings to URLs early.

public/platform/WebCredentialManager.h

 // 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.
 
 #ifndef WebCredentialManager_h
 #define WebCredentialManager_h
 
 #include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCredentialManagerError.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebVector.h"
 
 namespace blink {
 
 // WebCredentialManager provides an interface for asking Blink's embedder to
 // respond to `navigator.credentials.*` calls.
 class WebCredentialManager {
 public:
     typedef WebCallbacks<WebCredential, WebCredentialManagerError> RequestCallbacks;
     typedef WebCallbacks<void, WebCredentialManagerError> NotificationCallbacks;
 
     WebCredentialManager();
     virtual ~WebCredentialManager();
 
     // Ownership of the callback is transferred to the callee for each of the following methods.
     virtual void dispatchFailedSignIn(const WebCredential&, NotificationCallbacks*) { }
     virtual void dispatchSignedIn(const WebCredential&, NotificationCallbacks*) { }
     virtual void dispatchSignedOut(NotificationCallbacks*) { }
-    virtual void dispatchRequest(bool zeroClickOnly, const WebVector<WebString>& federations, RequestCallbacks*) { }
+    virtual void dispatchRequest(bool zeroClickOnly, const WebVector<WebURL>& federations, RequestCallbacks*) { }
 };
 
 } // namespace blink
 
 #endif // WebCredentialManager_h