Remove the enable_task_manager build flag and define.

chrome/browser/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/chrome_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//build/split_static_library.gni")
 import("//chrome/common/features.gni")
@@ skipping 1806 matching lines @@
       "background/background_mode_manager_mac.mm",
       "background/background_mode_manager_win.cc",
       "background/background_mode_optimizer.cc",
       "background/background_mode_optimizer.h",
       "background/background_trigger.h",
     ]
     if (!use_aura || is_win || is_chromeos) {
       sources -= [ "background/background_mode_manager_aura.cc" ]
     }
   }
-  if (enable_task_manager) {
-    sources += [
-      "task_manager/providers/browser_process_task.cc",
-      "task_manager/providers/browser_process_task.h",
-      "task_manager/providers/browser_process_task_provider.cc",
-      "task_manager/providers/browser_process_task_provider.h",
-      "task_manager/providers/child_process_task.cc",
-      "task_manager/providers/child_process_task.h",
-      "task_manager/providers/child_process_task_provider.cc",
-      "task_manager/providers/child_process_task_provider.h",
-      "task_manager/providers/task.cc",
-      "task_manager/providers/task.h",
-      "task_manager/providers/task_provider.cc",
-      "task_manager/providers/task_provider.h",
-      "task_manager/providers/task_provider_observer.h",
-      "task_manager/providers/web_contents/background_contents_tag.cc",
-      "task_manager/providers/web_contents/background_contents_tag.h",
-      "task_manager/providers/web_contents/background_contents_task.cc",
-      "task_manager/providers/web_contents/background_contents_task.h",
-      "task_manager/providers/web_contents/devtools_tag.cc",
-      "task_manager/providers/web_contents/devtools_tag.h",
-      "task_manager/providers/web_contents/devtools_task.cc",
-      "task_manager/providers/web_contents/devtools_task.h",
-      "task_manager/providers/web_contents/extension_tag.cc",
-      "task_manager/providers/web_contents/extension_tag.h",
-      "task_manager/providers/web_contents/extension_task.cc",
-      "task_manager/providers/web_contents/extension_task.h",
-      "task_manager/providers/web_contents/guest_tag.cc",
-      "task_manager/providers/web_contents/guest_tag.h",
-      "task_manager/providers/web_contents/guest_task.cc",
-      "task_manager/providers/web_contents/guest_task.h",
-      "task_manager/providers/web_contents/prerender_tag.cc",
-      "task_manager/providers/web_contents/prerender_tag.h",
-      "task_manager/providers/web_contents/prerender_task.cc",
-      "task_manager/providers/web_contents/prerender_task.h",
-      "task_manager/providers/web_contents/printing_tag.cc",
-      "task_manager/providers/web_contents/printing_tag.h",
-      "task_manager/providers/web_contents/printing_task.cc",
-      "task_manager/providers/web_contents/printing_task.h",
-      "task_manager/providers/web_contents/renderer_task.cc",
-      "task_manager/providers/web_contents/renderer_task.h",
-      "task_manager/providers/web_contents/subframe_task.cc",
-      "task_manager/providers/web_contents/subframe_task.h",
-      "task_manager/providers/web_contents/tab_contents_tag.cc",
-      "task_manager/providers/web_contents/tab_contents_tag.h",
-      "task_manager/providers/web_contents/tab_contents_task.cc",
-      "task_manager/providers/web_contents/tab_contents_task.h",
-      "task_manager/providers/web_contents/web_contents_tag.cc",
-      "task_manager/providers/web_contents/web_contents_tag.h",
-      "task_manager/providers/web_contents/web_contents_tags_manager.cc",
-      "task_manager/providers/web_contents/web_contents_tags_manager.h",
-      "task_manager/providers/web_contents/web_contents_task_provider.cc",
-      "task_manager/providers/web_contents/web_contents_task_provider.h",
-      "task_manager/sampling/shared_sampler.h",
-      "task_manager/sampling/shared_sampler_posix.cc",
-      "task_manager/sampling/shared_sampler_win.cc",
-      "task_manager/sampling/task_group.cc",
-      "task_manager/sampling/task_group.h",
-      "task_manager/sampling/task_group_sampler.cc",
-      "task_manager/sampling/task_group_sampler.h",
-      "task_manager/sampling/task_manager_impl.cc",
-      "task_manager/sampling/task_manager_impl.h",
-      "task_manager/sampling/task_manager_io_thread_helper.cc",
-      "task_manager/sampling/task_manager_io_thread_helper.h",
-      "task_manager/task_manager_interface.cc",
-      "task_manager/task_manager_interface.h",
-      "task_manager/task_manager_observer.cc",
-      "task_manager/task_manager_observer.h",
-    ]
-    if (is_chromeos) {
-      sources += [
-        "task_manager/providers/arc/arc_process_task.cc",
-        "task_manager/providers/arc/arc_process_task.h",
-        "task_manager/providers/arc/arc_process_task_provider.cc",
-        "task_manager/providers/arc/arc_process_task_provider.h",
-      ]
-    }
-  }
   if (enable_spellcheck) {
     sources += [
       "spellchecker/spellcheck_custom_dictionary.cc",
       "spellchecker/spellcheck_custom_dictionary.h",
       "spellchecker/spellcheck_dictionary.h",
       "spellchecker/spellcheck_factory.cc",
       "spellchecker/spellcheck_factory.h",
       "spellchecker/spellcheck_hunspell_dictionary.cc",
       "spellchecker/spellcheck_hunspell_dictionary.h",
       "spellchecker/spellcheck_message_filter.cc",
@@ skipping 317 matching lines @@
       "metrics/perf/cpu_identity.cc",
       "metrics/perf/cpu_identity.h",
       "metrics/perf/perf_output.cc",
       "metrics/perf/perf_output.h",
       "metrics/perf/random_selector.cc",
       "metrics/perf/random_selector.h",
       "metrics/perf/windowed_incognito_observer.cc",
       "metrics/perf/windowed_incognito_observer.h",
       "policy/default_geolocation_policy_handler.cc",
       "policy/default_geolocation_policy_handler.h",
+      "task_manager/providers/arc/arc_process_task.cc",
+      "task_manager/providers/arc/arc_process_task.h",
+      "task_manager/providers/arc/arc_process_task_provider.cc",
+      "task_manager/providers/arc/arc_process_task_provider.h",
     ]
     deps += [ "//chrome/browser/chromeos" ]
     public_deps += [
       "//components/metrics/leak_detector:interfaces",
       "//components/metrics/leak_detector:leak_detector",
     ]
   } else {  # Non-ChromeOS.
     sources += [
       "policy/cloud/user_cloud_policy_manager_factory.cc",
       "policy/cloud/user_cloud_policy_manager_factory.h",
@@ skipping 575 matching lines @@
       "ssl/ssl_client_auth_observer.cc",
       "ssl/ssl_client_auth_observer.h",
       "status_icons/desktop_notification_balloon.cc",
       "status_icons/desktop_notification_balloon.h",
       "sync/glue/extension_data_type_controller.cc",
       "sync/glue/extension_data_type_controller.h",
       "sync/glue/extension_setting_data_type_controller.cc",
       "sync/glue/extension_setting_data_type_controller.h",
       "sync/sync_ui_util.cc",
       "sync/sync_ui_util.h",
+      "task_manager/providers/browser_process_task.cc",
+      "task_manager/providers/browser_process_task.h",
+      "task_manager/providers/browser_process_task_provider.cc",
+      "task_manager/providers/browser_process_task_provider.h",
+      "task_manager/providers/child_process_task.cc",
+      "task_manager/providers/child_process_task.h",
+      "task_manager/providers/child_process_task_provider.cc",
+      "task_manager/providers/child_process_task_provider.h",
+      "task_manager/providers/task.cc",
+      "task_manager/providers/task.h",
+      "task_manager/providers/task_provider.cc",
+      "task_manager/providers/task_provider.h",
+      "task_manager/providers/task_provider_observer.h",
+      "task_manager/providers/web_contents/background_contents_tag.cc",
+      "task_manager/providers/web_contents/background_contents_tag.h",
+      "task_manager/providers/web_contents/background_contents_task.cc",
+      "task_manager/providers/web_contents/background_contents_task.h",
+      "task_manager/providers/web_contents/devtools_tag.cc",
+      "task_manager/providers/web_contents/devtools_tag.h",
+      "task_manager/providers/web_contents/devtools_task.cc",
+      "task_manager/providers/web_contents/devtools_task.h",
+      "task_manager/providers/web_contents/extension_tag.cc",
+      "task_manager/providers/web_contents/extension_tag.h",
+      "task_manager/providers/web_contents/extension_task.cc",
+      "task_manager/providers/web_contents/extension_task.h",
+      "task_manager/providers/web_contents/guest_tag.cc",
+      "task_manager/providers/web_contents/guest_tag.h",
+      "task_manager/providers/web_contents/guest_task.cc",
+      "task_manager/providers/web_contents/guest_task.h",
+      "task_manager/providers/web_contents/prerender_tag.cc",
+      "task_manager/providers/web_contents/prerender_tag.h",
+      "task_manager/providers/web_contents/prerender_task.cc",
+      "task_manager/providers/web_contents/prerender_task.h",
+      "task_manager/providers/web_contents/printing_tag.cc",
+      "task_manager/providers/web_contents/printing_tag.h",
+      "task_manager/providers/web_contents/printing_task.cc",
+      "task_manager/providers/web_contents/printing_task.h",
+      "task_manager/providers/web_contents/renderer_task.cc",
+      "task_manager/providers/web_contents/renderer_task.h",
+      "task_manager/providers/web_contents/subframe_task.cc",
+      "task_manager/providers/web_contents/subframe_task.h",
+      "task_manager/providers/web_contents/tab_contents_tag.cc",
+      "task_manager/providers/web_contents/tab_contents_tag.h",
+      "task_manager/providers/web_contents/tab_contents_task.cc",
+      "task_manager/providers/web_contents/tab_contents_task.h",
+      "task_manager/providers/web_contents/web_contents_tag.cc",
+      "task_manager/providers/web_contents/web_contents_tag.h",
+      "task_manager/providers/web_contents/web_contents_tags_manager.cc",
+      "task_manager/providers/web_contents/web_contents_tags_manager.h",
+      "task_manager/providers/web_contents/web_contents_task_provider.cc",
+      "task_manager/providers/web_contents/web_contents_task_provider.h",
+      "task_manager/sampling/shared_sampler.h",
+      "task_manager/sampling/shared_sampler_posix.cc",
+      "task_manager/sampling/shared_sampler_win.cc",
+      "task_manager/sampling/task_group.cc",
+      "task_manager/sampling/task_group.h",
+      "task_manager/sampling/task_group_sampler.cc",
+      "task_manager/sampling/task_group_sampler.h",
+      "task_manager/sampling/task_manager_impl.cc",
+      "task_manager/sampling/task_manager_impl.h",
+      "task_manager/sampling/task_manager_io_thread_helper.cc",
+      "task_manager/sampling/task_manager_io_thread_helper.h",
+      "task_manager/task_manager_interface.cc",
+      "task_manager/task_manager_interface.h",
+      "task_manager/task_manager_observer.cc",
+      "task_manager/task_manager_observer.h",
       "upgrade_detector.cc",
       "upgrade_detector.h",
       "usb/usb_chooser_controller.cc",
       "usb/usb_chooser_controller.h",
       "usb/web_usb_chooser_service.cc",
       "usb/web_usb_chooser_service.h",
       "usb/web_usb_detector.cc",
       "usb/web_usb_detector.h",
     ]
     deps += [
@@ skipping 1598 matching lines @@
   # linking all of the test support.
   static_library("pepper_cdm_test_constants") {
     testonly = true
     visibility = [ "//chrome/*" ]
     sources = [
       "media/pepper_cdm_test_constants.cc",
       "media/pepper_cdm_test_constants.h",
     ]
   }
 }