Remove the old task manager view

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("//chrome/common/features.gni")
 import("//media/media_options.gni")
@@ skipping 461 matching lines @@
   if (enable_task_manager) {
     sources += rebase_path(gypi_values.chrome_browser_task_manager_sources,
                            ".",
                            "//chrome")
     if (is_chromeos) {
       sources +=
           rebase_path(gypi_values.chrome_browser_task_manager_chromeos_sources,
                       ".",
                       "//chrome")
     }
+
+    if (is_mac) {
+      sources +=
+          rebase_path(gypi_values.chrome_browser_old_task_manager_mac_sources,
+                      ".",
+                      "//chrome")
+    }
   }
   if (enable_spellcheck) {
     sources += rebase_path(gypi_values.chrome_browser_spellchecker_sources,
                            ".",
                            "//chrome")
     if (!is_android) {
       deps += [ "//third_party/hunspell" ]
     }
   }
   if (enable_nacl) {
@@ skipping 842 matching lines @@
         rebase_path(gypi_values.chrome_browser_rlz_sources, ".", "//chrome")
     deps = [
       "//components/google/core/browser",
       "//components/omnibox/browser",
       "//components/rlz",
       "//components/search_engines",
       "//rlz:rlz_lib",
     ]
   }
 }