Migrate ProcessesEventRouter to the new task manager

chrome/browser/extensions/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/features.gni")
 import("//build/config/ui.gni")
 
 assert(enable_extensions)
 
 gypi_values =
@@ skipping 66 matching lines @@
     "//ui/accessibility:ax_gen",
     "//ui/base",
     "//ui/base/ime",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/resources",
     "//ui/strings",
     "//url",
   ]
 
+  if (enable_task_manager) {
+    sources +=
+        gypi_values.chrome_browser_extensions_task_manager_enabled_sources
+  }
+
   if (is_chromeos) {
     sources +=
         rebase_path(gypi_values.chrome_browser_extensions_chromeos_sources,
                     ".",
                     "//chrome")
     sources -= [ "api/music_manager_private/device_id_linux.cc" ]
     configs += [ "//build/config/linux:dbus" ]
     deps += [
       "//components/chrome_apps",
       "//remoting/host/it2me:common",
@@ skipping 123 matching lines @@
                     "//chrome")
   }
 
   if (is_chromeos && use_ozone) {
     sources -= [ "global_shortcut_listener_chromeos.cc" ]
   }
   if (!use_ozone) {
     sources -= [ "global_shortcut_listener_ozone.cc" ]
   }
 }