Remove the obsolete avatarURL method from the credential manager.

public/platform/WebCredential.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 WebCredential_h
 #define WebCredential_h
 
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebPrivatePtr.h"
 #include "public/platform/WebString.h"
@@ skipping 13 matching lines @@
     BLINK_PLATFORM_EXPORT void reset();
 
     BLINK_PLATFORM_EXPORT WebString id() const;
     BLINK_PLATFORM_EXPORT WebString name() const;
     BLINK_PLATFORM_EXPORT WebURL iconURL() const;
     BLINK_PLATFORM_EXPORT WebString type() const;
 
     BLINK_PLATFORM_EXPORT bool isPasswordCredential() const;
     BLINK_PLATFORM_EXPORT bool isFederatedCredential() const;
 
-    // TODO(mkwst, msramek): Drop this once Chromium is updated. https://crbug.com/494880
+    // TODO(mkwst): Drop this once Chromium is updated. https://crbug.com/494880
     BLINK_PLATFORM_EXPORT bool isLocalCredential() const { return isPasswordCredential(); }
-    BLINK_PLATFORM_EXPORT WebURL avatarURL() const { return iconURL(); }
 
 #if INSIDE_BLINK
     BLINK_PLATFORM_EXPORT static WebCredential create(PlatformCredential*);
     BLINK_PLATFORM_EXPORT WebCredential& operator=(PlatformCredential*);
     BLINK_PLATFORM_EXPORT PlatformCredential* platformCredential() const { return m_platformCredential.get(); }
 #endif
 
 protected:
 #if INSIDE_BLINK
     BLINK_PLATFORM_EXPORT WebCredential(PlatformCredential*);
 #endif
 
     WebPrivatePtr<PlatformCredential> m_platformCredential;
 };
 
 } // namespace blink
 
 #endif // WebCredential_h