Remove the mojo serial interfaces and related infrastructure.

extensions/common/switches.cc

 // Copyright 2013 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 "extensions/common/switches.h"
 
 namespace extensions {
 
 namespace switches {
 
@@ skipping 30 matching lines @@
 
 // Enables extension APIs that are in development.
 const char kEnableExperimentalExtensionApis[] =
     "enable-experimental-extension-apis";
 
 // Hack so that feature switch can work with about_flags. See
 // kEnableScriptsRequireAction.
 const char kEnableExtensionActionRedesign[] =
     "enable-extension-action-redesign";
 
-// Enables the mojo implementation of the serial API.
-const char kEnableMojoSerialService[] = "enable-mojo-serial-service";
-
 // Enables extensions to hide bookmarks UI elements.
 const char kEnableOverrideBookmarksUI[] = "enable-override-bookmarks-ui";
 
 // Enables tab for desktop sharing.
 const char kDisableTabForDesktopShare[] = "disable-tab-for-desktop-share";
 
 // Disable new UI for desktop capture picker window.
 const char kDisableDesktopCapturePickerNewUI[] =
     "disable-desktop-capture-picker-new-ui";
 
@@ skipping 49 matching lines @@
 // Pass launch source to platform apps.
 const char kTraceAppSource[] = "enable-trace-app-source";
 
 // Enable package hash check: the .crx file sha256 hash sum should be equal to
 // the one received from update manifest.
 const char kEnableCrxHashCheck[] = "enable-crx-hash-check";
 
 }  // namespace switches
 
 }  // namespace extensions