Rename avatarURL to iconURL in the credential manager in Blink.

Source/platform/exported/WebPasswordCredential.cpp

 // Copyright 2015 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 "config.h"
 #include "public/platform/WebPasswordCredential.h"
 
 #include "platform/credentialmanager/PlatformPasswordCredential.h"
 
 namespace blink {
-WebPasswordCredential::WebPasswordCredential(const WebString& id, const WebString& password, const WebString& name, const WebURL& avatarURL)
-    : WebCredential(PlatformPasswordCredential::create(id, password, name, avatarURL))
+WebPasswordCredential::WebPasswordCredential(const WebString& id, const WebString& password, const WebString& name, const WebURL& iconURL)
+    : WebCredential(PlatformPasswordCredential::create(id, password, name, iconURL))
 {
 }
 
 void WebPasswordCredential::assign(const WebPasswordCredential& other)
 {
     m_platformCredential = other.m_platformCredential;
 }
 
 WebString WebPasswordCredential::password() const
 {
     return static_cast<PlatformPasswordCredential*>(m_platformCredential.get())->password();
 }
 
 WebPasswordCredential::WebPasswordCredential(PlatformCredential* credential)
     : WebCredential(credential)
 {
 }
 
 WebPasswordCredential& WebPasswordCredential::operator=(PlatformCredential* credential)
 {
     m_platformCredential = credential;
     return *this;
 }
 
 } // namespace blink