Run event executor on the ui thread to remove the need to explicitly XFlush() the XTest calls.

remoting/remoting.gyp

 # Copyright (c) 2010 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': {
@@ skipping 211 matching lines @@
             'host/event_executor_win.h',
           ],
         }],
         ['OS=="linux"', {
           'sources': [
             'host/capturer_linux.cc',
             'host/capturer_linux.h',
             'host/event_executor_linux.cc',
             'host/event_executor_linux.h',
           ],
+          'dependencies': [
+            '../build/linux/system.gyp:gtk',
+          ],
           'link_settings': {
             'libraries': [
               '-lX11',
               '-lXdamage',
               '-lXtst',
             ],
           },
         }],
         ['OS=="mac"', {
           'sources': [
@@ skipping 335 matching lines @@
       ],  # end of 'conditions'
     },  # end of target 'chromoting_unittests'
   ],  # end of targets
 }
 
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