[Mac, Win] The fast user switcher should use the small, non-high res default avatars

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 #import <Carbon/Carbon.h>  // kVK_Return.
 
 #import "chrome/browser/ui/cocoa/profiles/profile_chooser_controller.h"
 
 #include "base/mac/bundle_locations.h"
@@ skipping 1764 matching lines @@
   const AvatarMenu::Item& item = avatarMenu_->GetItemAt(itemIndex);
 
   NSRect rect = NSMakeRect(
       0, 0, kFixedMenuWidth, kBlueButtonHeight + kSmallVerticalSpacing);
   base::scoped_nsobject<BackgroundColorHoverButton> profileButton(
       [[BackgroundColorHoverButton alloc]
           initWithFrame:rect
       imageTitleSpacing:kImageTitleSpacing
         backgroundColor:GetDialogBackgroundColor()]);
   [profileButton setTitle:base::SysUTF16ToNSString(item.name)];
+
+  // Use the low-res, small default avatars in the fast user switcher, like
+  // we do in the menu bar.
+  gfx::Image itemIcon;
+  bool isRectangle;
+  AvatarMenu::GetImageForMenuButton(item.profile_path, &itemIcon, &isRectangle);
+
   [profileButton setDefaultImage:CreateProfileImage(
-      item.icon, kSmallImageSide).ToNSImage()];
+      itemIcon, kSmallImageSide).ToNSImage()];
   [profileButton setImagePosition:NSImageLeft];
   [profileButton setAlignment:NSLeftTextAlignment];
   [profileButton setBordered:NO];
   [profileButton setTag:itemIndex];
   [profileButton setTarget:self];
   [profileButton setAction:@selector(switchToProfile:)];
 
   return profileButton.autorelease();
 }
 
@@ skipping 473 matching lines @@
 }
 
 - (bool)shouldShowGoIncognito {
   bool incognitoAvailable =
       IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
           IncognitoModePrefs::DISABLED;
   return incognitoAvailable && !browser_->profile()->IsGuestSession();
 }
 
 @end