Double clicking the resize handle should expand window along that axis.

ash/ash.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
   },
 
@@ skipping 245 matching lines @@
         '../ui/ui.gyp:ui_resources',
         '../ui/ui.gyp:ui_resources_standard',
         '../ui/views/views.gyp:views',
         'ash',
       ],
       'sources': [
         '../ui/views/test/test_views_delegate.cc',
         '../ui/views/test/test_views_delegate.h',
         'accelerators/accelerator_controller_unittest.cc',
         'accelerators/accelerator_filter_unittest.cc',
-        'accelerators/nested_dispatcher_controller_unittest.cc',
+        'accelerators/nested_dispatcher_controller_unittest.cc',
         'drag_drop/drag_drop_controller_unittest.cc',
         'focus_cycler_unittest.cc',
         'ime/input_method_event_filter_unittest.cc',
         'launcher/launcher_model_unittest.cc',
         'launcher/launcher_unittest.cc',
         'launcher/view_model_unittest.cc',
         'launcher/view_model_utils_unittest.cc',
         'shell_unittest.cc',
         'test/ash_unittests.cc',
         'test/ash_test_base.cc',
@@ skipping 16 matching lines @@
         'wm/root_window_event_filter_unittest.cc',
         'wm/shadow_controller_unittest.cc',
         'wm/shelf_layout_manager_unittest.cc',
         'wm/system_modal_container_layout_manager_unittest.cc',
         'wm/toplevel_layout_manager_unittest.cc',
         'wm/toplevel_window_event_filter_unittest.cc',
         'wm/video_detector_unittest.cc',
         'wm/visibility_controller_unittest.cc',
         'wm/window_cycle_controller_unittest.cc',
         'wm/window_modality_controller_unittest.cc',
+        'wm/workspace/workspace_event_filter_unittest.cc',
         'wm/workspace/workspace_manager_unittest.cc',
         'wm/workspace/workspace_window_resizer_unittest.cc',
 
         '<(SHARED_INTERMEDIATE_DIR)/ui/gfx/gfx_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources/ui_resources.rc',
         '<(SHARED_INTERMEDIATE_DIR)/ui/ui_resources_standard/ui_resources_standard.rc',
       ],
       'conditions': [
         ['use_ibus==1', {
           'dependencies': [
@@ skipping 85 matching lines @@
             'shell/cocoa/app-Info.plist',
           ],
           'xcode_settings': {
             'INFOPLIST_FILE': 'shell/cocoa/app-Info.plist',
           },
         }],
       ],
     },
   ],
 }