Implement "open link as user" context menu entry

chrome/browser/profiles/profile_info_cache.h

 // Copyright (c) 2012 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 CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 56 matching lines @@
   // the item being referred to to change out from under you.
   // Deprecated. Prefer using the ProfileAttributesStorage interface instead of
   // directly referring to this implementation.
   size_t GetIndexOfProfileWithPath(
       const base::FilePath& profile_path) const override;
   base::string16 GetNameOfProfileAtIndex(size_t index) const override;
   base::string16 GetShortcutNameOfProfileAtIndex(size_t index) const override;
   base::FilePath GetPathOfProfileAtIndex(size_t index) const override;
   base::Time GetProfileActiveTimeAtIndex(size_t index) const override;
   base::string16 GetUserNameOfProfileAtIndex(size_t index) const override;
-  const gfx::Image& GetAvatarIconOfProfileAtIndex(size_t index) override;
+  const gfx::Image& GetAvatarIconOfProfileAtIndex(size_t index) const override;
   std::string GetLocalAuthCredentialsOfProfileAtIndex(
       size_t index) const override;
   std::string GetPasswordChangeDetectionTokenAtIndex(
       size_t index) const override;
   // Note that a return value of false could mean an error in collection or
   // that there are currently no background apps running. However, the action
   // which results is the same in both cases (thus far).
   bool GetBackgroundStatusOfProfileAtIndex(size_t index) const override;
   base::string16 GetGAIANameOfProfileAtIndex(size_t index) const override;
   base::string16 GetGAIAGivenNameOfProfileAtIndex(size_t index) const override;
@@ skipping 180 matching lines @@
       avatar_images_downloads_in_progress_;
 
   // Determines of the ProfileAvatarDownloader should be created and executed
   // or not. Only set to true for tests.
   bool disable_avatar_download_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileInfoCache);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_INFO_CACHE_H_