ozone gbm: whitelist 3 DRM ioctl code for native GpuMemoryBuffer.

content/content_common.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../components/tracing.gyp:tracing',
     '../gpu/command_buffer/command_buffer.gyp:gles2_utils',
     '../net/net.gyp:net',
@@ skipping 18 matching lines @@
     '../base/base.gyp:base',
     # The public content API headers directly include Blink API headers, so we
     # have to export the blink header settings so that relative paths in these
     # headers resolve correctly.
     '../third_party/WebKit/public/blink_headers.gyp:blink_headers',
     '../ui/accessibility/accessibility.gyp:ax_gen',
   ],
   'variables': {
     'use_v4lplugin%': 0,
     'use_v4l2_codec%': 0,
+    'use_vgem_map%': 0,

[dshwang, 2015/08/26 14:18:02]

to avoid this duplication, we can define it in build/common.gypi
spang, wdyt?

     'public_common_sources': [
       'public/common/appcache_info.h',
       'public/common/bindings_policy.h',
       'public/common/browser_plugin_guest_mode.cc',
       'public/common/browser_plugin_guest_mode.h',
       'public/common/child_process_host.h',
       'public/common/child_process_host_delegate.cc',
       'public/common/child_process_host_delegate.h',
       'public/common/child_process_sandbox_support_linux.h',
       'public/common/color_suggestion.cc',
@@ skipping 1038 matching lines @@
         'common/cursors/webcursor_ozone.cc',
         'common/font_list_ozone.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.h',
         'common/gpu/gpu_memory_buffer_factory_ozone.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
     }],
+    ['use_vgem_map==1', {
+      'defines': ['USE_VGEM_MAP'],
+    }],
   ],
 }