Media Galleries API Picasa: Add file watch to invalidate database data on disk write.

chrome/chrome_browser.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 2545 matching lines @@
               '$(SDKROOT)/System/Library/Frameworks/CoreText.framework',
               '$(SDKROOT)/System/Library/Frameworks/MobileCoreServices.framework',
               '$(SDKROOT)/System/Library/Frameworks/QuartzCore.framework',
             ],
             # CoreImage is iOS 5+, but iOS 4.3 is still supported.
             'xcode_settings': {'OTHER_LDFLAGS': ['-weak_framework CoreImage']},
           },
         }],
         ['OS=="win" or OS=="mac"', {
           'sources': [
+            'browser/media_galleries/fileapi/file_path_watcher_util.cc',
+            'browser/media_galleries/fileapi/file_path_watcher_util.h',
             'browser/media_galleries/fileapi/itunes_data_provider.cc',
             'browser/media_galleries/fileapi/itunes_data_provider.h',
             'browser/media_galleries/fileapi/itunes_file_util.cc',
             'browser/media_galleries/fileapi/itunes_file_util.h',
             'browser/media_galleries/fileapi/picasa/picasa_data_provider.cc',
             'browser/media_galleries/fileapi/picasa/picasa_data_provider.h',
             'browser/media_galleries/fileapi/picasa/picasa_file_util.cc',
             'browser/media_galleries/fileapi/picasa/picasa_file_util.h',
             'browser/media_galleries/fileapi/safe_itunes_library_parser.cc',
             'browser/media_galleries/fileapi/safe_itunes_library_parser.h',
@@ skipping 983 matching lines @@
             'package_name': 'org/chromium/chrome/browser/ui/toolbar',
             'template_deps': ['browser/ui/toolbar/toolbar_model_security_level_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
      },
     ],
   ],
 }