Rename avatarURL to iconURL in the credential manager in Blink.

public/platform/WebPasswordCredential.h

 // 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.
 
 #ifndef WebPasswordCredential_h
 #define WebPasswordCredential_h
 
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebCredential.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 
 namespace blink {
 
 class WebPasswordCredential : public WebCredential {
 public:
-    BLINK_PLATFORM_EXPORT WebPasswordCredential(const WebString& id, const WebString& password, const WebString& name, const WebURL& avatarURL);
+    BLINK_PLATFORM_EXPORT WebPasswordCredential(const WebString& id, const WebString& password, const WebString& name, const WebURL& iconURL);
 
     BLINK_PLATFORM_EXPORT void assign(const WebPasswordCredential&);
 
     BLINK_PLATFORM_EXPORT WebString password() const;
 
 #if INSIDE_BLINK
     BLINK_PLATFORM_EXPORT WebPasswordCredential(PlatformCredential*);
     BLINK_PLATFORM_EXPORT WebPasswordCredential& operator=(PlatformCredential*);
 #endif
 };
 
 } // namespace blink
 
 #endif // WebPasswordCredential_h