add assert that the lock-count on pixelref is balanced

gyp/skia_for_android_framework_defines.gypi

 # Copyright 2014 Google Inc.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This file is included by chrome's skia/skia_common.gypi, and is intended to
 # augment the skia flags that are set there.
 
 {
   'variables': {
 
     # These flags will be defined in the android framework.
     #
     # If these become 'permanent', they should be moved into common_variables.gypi
     #
     'skia_for_android_framework_defines': [
       'SK_SUPPORT_LEGACY_PUBLIC_IMAGEINFO_FIELDS',
       'SK_SUPPORT_LEGACY_GETDEVICE',

[robertphillips, 2015/05/21 13:32:04]

Don't we need this in the Chromium gypi too?

+      'SK_SUPPORT_LEGACY_UNBALANCED_PIXELREF_LOCKCOUNT',
       # Needed until we fix skbug.com/2440.
       'SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG',
       'SK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS',
       'SK_SUPPORT_LEGACY_SCALAR_DIV',
     ],
   },
 }