[Android] Abandon bundling DevTools frontends for mobile apps

chrome/browser/chrome_browser_main_android.cc

 // Copyright (c) 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/chrome_browser_main_android.h"
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/path_service.h"
 #include "cc/base/switches.h"
@@ skipping 66 matching lines @@
       "ChromeBrowserMainPartsAndroid::PreEarlyInitialization:StartUiMsgLoop");
     base::MessageLoopForUI::current()->Start();
   }
 
   CommandLine::ForCurrentProcess()->AppendSwitch(
       cc::switches::kCompositeToMailbox);
 
   ChromeBrowserMainParts::PreEarlyInitialization();
 }
 
-int ChromeBrowserMainPartsAndroid::PreCreateThreads() {
-  TRACE_EVENT0("startup", "ChromeBrowserMainPartsAndroid::PreCreateThreads")
-  // PreCreateThreads initializes ResourceBundle instance.
-  const int result = ChromeBrowserMainParts::PreCreateThreads();
-
-  // Add devtools_resources.pak which is used in Chromium TestShell.
-  base::FilePath paks_path;
-  PathService::Get(ui::DIR_RESOURCE_PAKS_ANDROID, &paks_path);
-  ResourceBundle::GetSharedInstance().AddOptionalDataPackFromPath(
-      paks_path.Append(FILE_PATH_LITERAL("devtools_resources.pak")),
-      ui::SCALE_FACTOR_NONE);
-
-  return result;
-}
-
 void ChromeBrowserMainPartsAndroid::ShowMissingLocaleMessageBox() {
   NOTREACHED();
 }
 
 void RecordBreakpadStatusUMA(MetricsService* metrics) {
   // TODO: crbug.com/139023
   NOTIMPLEMENTED();
 }
 
 void WarnAboutMinimumSystemRequirements() {
 }