gpu: Convert egl_main_native target to GN build.

gpu/gles2_conform_support/gles2_conform_support.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,
     # These are defined here because we want to be able to compile them on
     # the buildbots without needed the OpenGL ES 2.0 conformance tests
     # which are not open source.
     'bootstrap_sources_native': [
       'native/main.cc',

[tfarina, 2015/03/08 15:07:32]

I don't understand exactly why we are putting main in static_libraries below.

I didn't follow this craziness in my GN version!

[Dirk Pranke, 2015/03/08 21:02:29]

I'm not sure I understand your confusion. It's not that weird to put a 'main()'
routine into a library, if you use the same main for a bunch of different
binaries (we do this in gtest_main.cc for gtest, for example).

You should probably follow what GYP does unless you get buy-in from an OWNER
that what you're doing is an improvement. I would check w/ piman@ about this.

[tfarina, 2015/03/09 21:53:23]

I put it back. Done.

     ],
    'conditions': [
      ['OS=="linux"', {
        'bootstrap_sources_native': [
          'native/egl_native.cc',
          'native/egl_native_aura.cc',
          'native/egl_native_x11.cc',
        ],
      }],
      ['OS=="win"', {
@@ skipping 30 matching lines @@
         'egl/surface.cc',
         'egl/surface.h',
       ],
       'defines': [
         'EGLAPI=',
         'EGLAPIENTRY=',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
+    # GN version: //gpu/gles2_conform_support/native

[Dirk Pranke, 2015/03/08 21:02:29]

Generally we try to put the comment right above the 'target_name' field, so,
move this down a line?

[tfarina, 2015/03/09 21:53:23]

Done.

     {
       'target_name': 'egl_main_native',
       'type': 'static_library',
       'dependencies': [
         'egl_native',
         '../../third_party/khronos/khronos.gyp:khronos_headers',
       ],
       'sources': [
         '<@(bootstrap_sources_native)',
       ],
@@ skipping 47 matching lines @@
         'EGLAPI=',
         'EGLAPIENTRY=',
       ],
       'sources': [
         '<@(bootstrap_sources_native)',
         'gles2_conform_support.c'
       ],
     },
   ],
 }