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

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

Index: chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
diff --git a/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm b/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
index b86fd5541f34527ef4bbcf38841f86eec36d2cdc..dc449c583134434bebc936b64e0bf8039a7812f8 100644
--- a/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
+++ b/chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm
@@ -1782,8 +1782,15 @@ class ActiveProfileObserverBridge : public AvatarMenuObserver,
       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];