GrAuditTrail can now be enabled/disabled at runtime

gyp/common_conditions.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
@@ skipping 656 matching lines @@
           '-Wl,-rpath,\$$ORIGIN/lib',
       ],
     }],
 
     [ 'skia_command_buffer and skia_os == "mac"', {
       'xcode_settings': {
           'LD_RUNPATH_SEARCH_PATHS': ['@executable_path/.'],
       },
     }],
 
-    [ 'skia_build_server', {
-      'defines': [
-        'GR_BATCH_DEBUGGING_OUTPUT=1',
-      ],
-    }],
-
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }