Fix ODR violation for ShowTaskManager() on Mac

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 131 matching lines @@
   if (enable_basic_printing || enable_print_preview) {
     deps += [ "//printing" ]
   }
 
   if (enable_one_click_signin) {
     sources +=
         rebase_path(gypi_values.chrome_browser_ui_one_click_signin_sources,
                     ".",
                     "//chrome")
   }
-  if (enable_task_manager) {
-    sources += rebase_path(gypi_values.chrome_browser_ui_task_manager_sources,
-                           ".",
-                           "//chrome")
-  }
   if (enable_nacl) {
     sources +=
         rebase_path(gypi_values.chrome_browser_ui_nacl_sources, ".", "//chrome")
     deps += [ "//native_client/src/trusted/service_runtime:sel" ]
   }
   if (enable_configuration_policy) {
     sources += rebase_path(gypi_values.chrome_browser_ui_policy_sources,
                            ".",
                            "//chrome")
     deps += [ "//components/policy" ]
@@ skipping 368 matching lines @@
     "//chrome/browser",
     "//content/public/browser",
     "//content/public/common",
     "//content/test:test_support",
     "//net:test_support",
     "//skia",
     "//testing/gtest",
     "//ui/base",
   ]
 }