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/file_util.h"
@@ skipping 72 matching lines @@
 #include "content/browser/system_message_window_win.h"
 #include "content/common/sandbox_win.h"
 #include "net/base/winsock_init.h"
 #include "ui/base/l10n/l10n_util_win.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
 #include <glib-object.h>
 #endif
 
-#if defined(OS_LINUX)
-#include "content/browser/device_monitor_linux.h"
+#if defined(OS_LINUX) && defined(USE_UDEV)
+#include "content/browser/device_monitor_udev.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)
 #include <sys/stat.h>
@@ skipping 848 matching lines @@
   if (!GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
     established_gpu_channel = always_uses_gpu = false;
   }
   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
   ImageTransportFactory::Initialize();
 #elif defined(OS_ANDROID)
   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
 #endif
 #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
   {
     TRACE_EVENT0("startup",
       "BrowserMainLoop::BrowserThreadsStarted:InitResourceDispatcherHost");
     resource_dispatcher_host_.reset(new ResourceDispatcherHostImpl());
@@ skipping 95 matching lines @@
   if (parameters_.ui_task)
     base::MessageLoopForUI::current()->PostTask(FROM_HERE,
                                                 *parameters_.ui_task);
 
   base::RunLoop run_loop;
   run_loop.Run();
 #endif
 }
 
 }  // namespace content