Linux: Refactor udev device monitoring code into its own class so it can be reused more easily.

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     'browser/debugger/devtools_resources.gyp:devtools_resources',
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
@@ skipping 708 matching lines @@
     'browser/storage_partition.cc',
     'browser/storage_partition.h',
     'browser/storage_partition_map.cc',
     'browser/storage_partition_map.h',
     'browser/ssl/ssl_request_info.cc',
     'browser/ssl/ssl_request_info.h',
     'browser/system_message_window_win.cc',
     'browser/system_message_window_win.h',
     'browser/tcmalloc_internals_request_job.cc',
     'browser/tcmalloc_internals_request_job.h',
+    'browser/udev_linux.cc',
+    'browser/udev_linux.h',
     'browser/web_contents/debug_urls.cc',
     'browser/web_contents/debug_urls.h',
     'browser/web_contents/drag_utils_gtk.cc',
     'browser/web_contents/drag_utils_gtk.h',
     'browser/web_contents/interstitial_page_impl.cc',
     'browser/web_contents/interstitial_page_impl.h',
     'browser/web_contents/navigation_controller_impl.cc',
     'browser/web_contents/navigation_controller_impl.h',
     'browser/web_contents/navigation_entry_impl.cc',
     'browser/web_contents/navigation_entry_impl.h',
@@ skipping 244 matching lines @@
         ['exclude', '^browser/renderer_host/java/'],
       ],
     }],
     ['input_speech==0', {
       'sources/': [
         ['exclude', '^browser/speech/'],
       ],
     }],
   ],
 }