Remove remainder of Athena related code from Chrome

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")
 
 gypi_values = exec_script("//build/gypi_to_gn.py",
                           [ rebase_path("../../chrome_browser_ui.gypi") ],
@@ skipping 207 matching lines @@
     if (!is_chromeos) {
       sources += rebase_path(gypi_values.chrome_browser_ui_ash_non_chromeos,
                              ".",
                              "//chrome")
     }
   } else {  # Not ash.
     sources += rebase_path(gypi_values.chrome_browser_ui_non_ash_sources,
                            ".",
                            "//chrome")
   }
-  if (use_athena) {
-    sources += rebase_path(gypi_values.chrome_browser_ui_athena_sources,
-                           ".",
-                           "//chrome")
-  } else {  # Not athena.
-    if (!is_android) {
-      sources += rebase_path(
-              gypi_values.chrome_browser_ui_non_athena_non_mobile_sources,
-              ".",
-              "//chrome")
-    }
-    if (use_ash) {
-      sources +=
-          rebase_path(gypi_values.chrome_browser_ui_ash_non_athena_sources,
-                      ".",
-                      "//chrome")
-    }
-  }
   if (toolkit_views) {
     sources += rebase_path(gypi_values.chrome_browser_ui_views_sources,
                            ".",
                            "//chrome")
     deps += [ "//components/constrained_window" ]
     if (!is_chromeos) {
       sources +=
           rebase_path(gypi_values.chrome_browser_ui_views_non_chromeos_sources,
                       ".",
                       "//chrome")
@@ skipping 286 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }