Remove the enable_task_manager build flag and define.

chrome/browser/ui/browser_commands.cc

 // Copyright 2012 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.
 
 #include "chrome/browser/ui/browser_commands.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
@@ skipping 1064 matching lines @@
 
 void ToggleDevToolsWindow(Browser* browser, DevToolsToggleAction action) {
   if (action.type() == DevToolsToggleAction::kShowConsole)
     content::RecordAction(UserMetricsAction("DevTools_ToggleConsole"));
   else
     content::RecordAction(UserMetricsAction("DevTools_ToggleWindow"));
   DevToolsWindow::ToggleDevToolsWindow(browser, action);
 }
 
 bool CanOpenTaskManager() {
-#if defined(ENABLE_TASK_MANAGER)
+#if !defined(OS_ANDROID)
   return true;
 #else
   return false;
 #endif
 }
 
 void OpenTaskManager(Browser* browser) {
-#if defined(ENABLE_TASK_MANAGER)
+#if !defined(OS_ANDROID)
   content::RecordAction(UserMetricsAction("TaskManager"));
   chrome::ShowTaskManager(browser);
 #else
   NOTREACHED();
 #endif
 }
 
 void OpenFeedbackDialog(Browser* browser) {
   content::RecordAction(UserMetricsAction("Feedback"));
   chrome::ShowFeedbackPage(browser, std::string(), std::string());
@@ skipping 226 matching lines @@
       app_name, true /* trusted_source */, gfx::Rect(), browser->profile()));
   app_browser->tab_strip_model()->AppendWebContents(contents, true);
 
   contents->GetMutableRendererPrefs()->can_accept_load_drops = false;
   contents->GetRenderViewHost()->SyncRendererPrefs();
   app_browser->window()->Show();
 }
 #endif  // BUILDFLAG(ENABLE_EXTENSIONS)
 
 }  // namespace chrome