Simplify some old avatar menu button code.

chrome/browser/ui/BUILD.gn

 # 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("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
@@ skipping 441 matching lines @@
         [ "//third_party/google_toolbox_for_mac:google_toolbox_for_mac_config" ]
   } else {  # non-Mac.
     sources += rebase_path(gypi_values.chrome_browser_ui_non_mac_sources,
                            ".",
                            "//chrome")
   }
 
   if (is_win) {
     sources +=
         rebase_path(gypi_values.chrome_browser_ui_win_sources, ".", "//chrome")
-    sources -= [ "views/frame/taskbar_decorator.cc" ]
     public_deps += [
       "//ui/views",
       "//ui/views/controls/webview",
     ]
     deps += [
       "//chrome/installer/util:strings",
       "//components/search_engines",
       "//google_update",
       "//third_party/iaccessible2",
       "//third_party/isimpledom",
@@ skipping 218 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }