Add --disable-drive-prefetch flag for ChromeOS.

chrome/common/chrome_switches.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/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 1361 matching lines @@
 // is used to override OOBE/sign in WebUI init type.
 // Possible values: parallel|postpone. Default: parallel.
 const char kAshWebUIInit[]                  = "ash-webui-init";
 
 // Enables switching between different cellular carriers from the UI.
 const char kEnableCarrierSwitching[]        = "enable-carrier-switching";
 
 // Disables wallpaper boot animation (except of OOBE case).
 const char kDisableBootAnimation[]          = "disable-boot-animation";
 
+// Disables file prefetching in Google Drive Client for Chrome OS.
+const char kDisableDrivePrefetch[]          = "disable-drive-prefetch";
+
 // Disables reset the device to its factory state in design.
 const char kDisableFactoryReset[]           = "disable-factory-reset";
 
 // Disables gdata content provider.
 const char kDisableGData[]                  = "disable-gdata";
 
 // Disables new WebRTC implementation of user image picker.
 const char kDisableHtml5Camera[]            = "disable-html5-camera";
 
 // Avoid doing expensive animations upon login.
@@ skipping 205 matching lines @@
 }  // namespace switches
 
 namespace chrome {
 
 bool IsFramelessConstrainedDialogEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableFramelessConstrainedDialogs);
 }
 
 }  // namespace chrome