Implement "open link as user" context menu entry

chrome/browser/profiles/profile_info_cache.cc

 // 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.
 
 #include "chrome/browser/profiles/profile_info_cache.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/i18n/case_conversion.h"
 #include "base/logging.h"
@@ skipping 306 matching lines @@
 }
 
 base::string16 ProfileInfoCache::GetUserNameOfProfileAtIndex(
     size_t index) const {
   base::string16 user_name;
   GetInfoForProfileAtIndex(index)->GetString(kUserNameKey, &user_name);
   return user_name;
 }
 
 const gfx::Image& ProfileInfoCache::GetAvatarIconOfProfileAtIndex(
-    size_t index) {
+    size_t index) const {
   if (IsUsingGAIAPictureOfProfileAtIndex(index)) {
     const gfx::Image* image = GetGAIAPictureOfProfileAtIndex(index);
     if (image)
       return *image;
   }
 
 #if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
   // Use the high resolution version of the avatar if it exists. Mobile and
   // ChromeOS don't need the high resolution version so no need to fetch it.
   const gfx::Image* image = GetHighResAvatarOfProfileAtIndex(index);
@@ skipping 943 matching lines @@
     // The profile info is in the cache but its entry isn't created yet, insert
     // it in the map.
     scoped_ptr<ProfileAttributesEntry> new_entry(new ProfileAttributesEntry());
     profile_attributes_entries_.add(path, new_entry.Pass());
     profile_attributes_entries_.get(path)->Initialize(this, path);
   }
 
   *entry = profile_attributes_entries_.get(path);
   return true;
 }