Make it possible to disable udev in linux

content/browser/browser_main_loop.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 "content/browser/browser_main_loop.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/hi_res_timer_manager.h"
@@ skipping 59 matching lines @@
 #include "content/browser/system_message_window_win.h"
 #include "content/common/sandbox_policy.h"
 #include "ui/base/l10n/l10n_util_win.h"
 #include "net/base/winsock_init.h"
 #endif
 
 #if defined(OS_LINUX) || defined(OS_OPENBSD)
 #include <glib-object.h>
 #endif
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) && defined(USE_UDEV)
 #include "content/browser/device_monitor_linux.h"
 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 #include "content/browser/device_monitor_mac.h"
 #endif
 
 #if defined(TOOLKIT_GTK)
 #include "ui/gfx/gtk_util.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
@@ skipping 607 matching lines @@
 #endif
 
 #if !defined(OS_IOS)
   HistogramSynchronizer::GetInstance();
 
   BrowserGpuChannelHostFactory::Initialize();
 #if defined(USE_AURA)
   ImageTransportFactory::Initialize();
 #endif
 
-#if defined(OS_LINUX)
+#if defined(OS_LINUX) && defined(USE_UDEV)
   device_monitor_linux_.reset(new DeviceMonitorLinux());
 #elif defined(OS_MACOSX)
   device_monitor_mac_.reset(new DeviceMonitorMac());
 #endif
 
   // RDH needs the IO thread to be created.
   resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
 
   // MediaStreamManager needs the IO thread to be created.
   media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
@@ skipping 91 matching lines @@
   DCHECK_EQ(MessageLoop::TYPE_UI, MessageLoop::current()->type());
   if (parameters_.ui_task)
     MessageLoopForUI::current()->PostTask(FROM_HERE, *parameters_.ui_task);
 
   base::RunLoop run_loop;
   run_loop.Run();
 #endif
 }
 
 }  // namespace content