This patch implements Chromium's Aura gesture recognizer in terms of utouch-grail and utouch-frame …

ui/aura/aura.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,
   },
   'targets': [
     {
       'target_name': 'aura',
       'type': '<(component)',
       'dependencies': [
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
+        '../../build/linux/system.gyp:frame',
+        '../../build/linux/system.gyp:grail',
         '../../skia/skia.gyp:skia',
         '../gfx/compositor/compositor.gyp:compositor',
         '../ui.gyp:gfx_resources',
         '../ui.gyp:ui',
         '../ui.gyp:ui_resources',
       ],
       'defines': [
         'AURA_IMPLEMENTATION',
       ],
       'sources': [
@@ skipping 29 matching lines @@
         'env_observer.h',
         'event.cc',
         'event.h',
         'event_filter.h',
         'event_mac.mm',
         'event_mac.h',
         'focus_manager.h',
         'gestures/gesture_configuration.cc',
         'gestures/gesture_configuration.h',
         'gestures/gesture_recognizer.h',
-        'gestures/gesture_recognizer_aura.cc',
+        'gestures/gesture_point.cc',    

[rjkroege, 2012/04/02 17:05:15]

preserve the alphabetic order?

+        'gestures/gesture_point.h',     
+        'gestures/gesture_recognizer_aura.cc',
         'gestures/gesture_recognizer_aura.h',
-        'gestures/gesture_point.cc',
-        'gestures/gesture_point.h',
-        'gestures/velocity_calculator.cc',
-        'gestures/velocity_calculator.h',
-        'gestures/gesture_sequence.cc',
-        'gestures/gesture_sequence.h',
+        'gestures/gesture_recognizer_grail.cc',
+        'gestures/gesture_recognizer_grail.h',
+        'gestures/gesture_sequence.cc', 
+        'gestures/gesture_sequence.h',
+        'gestures/velocity_calculator.cc',      
+        'gestures/velocity_calculator.h',       
         'layout_manager.cc',
         'layout_manager.h',
         'root_window_host.h',
         'root_window_host_linux.cc',
         'root_window_host_linux.h',
         'root_window_host_mac.h',
         'root_window_host_mac.mm',
         'root_window_host_win.cc',
         'root_window_host_win.h',
         'root_window_mac.h',
         'root_window_mac.mm',
         'root_window_view_mac.h',
         'root_window_view_mac.mm',
         'root_window.cc',
         'root_window.h',
         'screen_aura.cc',
         'screen_aura.h',
         'window.cc',
         'window.h',
         'window_delegate.h',
         'window_observer.h',
       ],
       'conditions': [
         ['OS=="mac"', {
           'sources/': [
             ['exclude', 'client/dispatcher_client.cc'],
             ['exclude', 'client/dispatcher_client.h'],
           ],
         }],
+        ['use_utouch==1', {
+          'sources!': [
+             'gestures/gesture_point.cc',       
+             'gestures/gesture_point.h',        
+             'gestures/gesture_recognizer_aura.cc',
+             'gestures/gesture_recognizer_aura.h',
+             'gestures/gesture_sequence.cc',    
+             'gestures/gesture_sequence.h',
+             'gestures/velocity_calculator.cc', 
+             'gestures/velocity_calculator.h',
+          ],
+          'defines': [
+            'USE_UTOUCH',
+          ],
+          'dependencies': [
+            '../../build/linux/system.gyp:frame',
+            '../../build/linux/system.gyp:grail',       
+          ],
+        }, { #use_utouch!=1

[rjkroege, 2012/04/02 17:05:15]

shouldn't you be excluding the frame / grail dependency here?

+          'sources!': [
+             'gestures/gesture_recognizer_grail.cc',
+             'gestures/gesture_recognizer_grail.h',
+          ],
+        }],
       ],
     },
     {
       'target_name': 'test_support_aura',
       'type': 'static_library',
       'dependencies': [
         '../../skia/skia.gyp:skia',
         '../../testing/gtest.gyp:gtest',
         '../ui.gyp:ui',
         'aura',
@@ skipping 82 matching lines @@
         # osmesa GL implementation is used on linux.
         ['OS=="linux"', {
           'dependencies': [
             '<(DEPTH)/third_party/mesa/mesa.gyp:osmesa',
           ],
         }],
       ],
     },
   ],
 }