Have panels respond to changes in work area on Linux.

ui/ui.gyp

 # Copyright (c) 2011 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'target_defaults': {
     'conditions': [
@@ skipping 207 matching lines @@
         'base/win/ime_input.cc',
         'base/win/ime_input.h',
         'base/win/mouse_wheel_util.cc',
         'base/win/mouse_wheel_util.h',
         'base/win/shell.cc',
         'base/win/shell.h',
         'base/win/window_impl.cc',
         'base/win/window_impl.h',
         'base/x/active_window_watcher_x.cc',
         'base/x/active_window_watcher_x.h',
+        'base/x/active_window_watcher_x_observer.h',
         'base/x/events_x.cc',
+        'base/x/root_window_property_watcher_x.cc',
+        'base/x/root_window_property_watcher_x.h',
+        'base/x/work_area_watcher_x.cc',
+        'base/x/work_area_watcher_x.h',
+        'base/x/work_area_watcher_x_observer.h',
         'base/x/x11_util.cc',
         'base/x/x11_util.h',
         'base/x/x11_util_internal.h',
         'gfx/blit.cc',
         'gfx/blit.h',
         'gfx/brush.h',
         'gfx/canvas.cc',
         'gfx/canvas.h',
         'gfx/canvas_skia.h',
         'gfx/canvas_skia.cc',
@@ skipping 100 matching lines @@
             ['exclude', 'gfx/screen_gtk.cc'],
             ['exclude', 'gfx/native_theme_chromeos.cc'],
             ['exclude', 'gfx/native_theme_chromeos.h'],
             ['exclude', 'gfx/screen_win.cc'],
             ['exclude', 'base/view_prop.cc'],
             ['exclude', 'base/view_prop.h'],
             ['exclude', 'base/win/mouse_wheel_util.cc'],
             ['exclude', 'base/win/mouse_wheel_util.h'],
             ['exclude', 'base/x/active_window_watcher_x.cc'],
             ['exclude', 'base/x/active_window_watcher_x.h'],
+            ['exclude', 'base/x/active_window_watcher_x_observer.h'],
+            ['exclude', 'base/x/root_window_property_watcher_x.cc'],
+            ['exclude', 'base/x/root_window_property_watcher_x.h'],
+            ['exclude', 'base/x/work_area_watcher_x.cc'],
+            ['exclude', 'base/x/work_area_watcher_x.h'],
+            ['exclude', 'base/x/work_area_watcher_x_observer.h'],
            ],
         }, {  # use_aura!=1
           'sources!': [
             'gfx/native_theme_aura.cc',
             'gfx/native_theme_aura.h',
           ]
         }],
         ['use_aura==1 and OS=="win"', {
           'sources/': [
             ['exclude', 'base/dragdrop/os_exchange_data_provider_win.cc'],
@@ skipping 176 matching lines @@
             'link_settings': {
               'libraries': [
                 '-lX11',
               ],
             },
           },
         }, {  # use_x11==0
           'sources!': [
             'base/keycodes/keyboard_code_conversion_x.cc',
             'base/keycodes/keyboard_code_conversion_x.h',
-            'base/x/active_window_watcher_x.cc',
-            'base/x/active_window_watcher_x.h',
-            'base/x/events_x.cc',
-            'base/x/x11_util.cc',
-            'base/x/x11_util.h',
-            'base/x/x11_util_internal.h',
+            'base/x/',
           ],
         }],
         ['chromeos==1', {
           # On Chrome OS we replace the default GTK look with a special look.
           'sources!': [
             'gfx/native_theme_gtk.cc',
             'gfx/native_theme_gtk.h',
           ]
         }, {  # chromeos != 1
           'sources!': [
@@ skipping 81 matching lines @@
                 'shutil.copyfile(\'<(ui_copy_target)\', \'<(ui_copy_dest)\'); ' \
                 'os.chmod(\'<(ui_copy_dest)\', 0700)'
               ]
             }
           ],
         },
       ],
     }],
   ],
 }