skia: add ability to load command_buffer_gles2

gyp/gpu.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # GYP for building gpu
 {
   'target_defaults': {
     'conditions': [
       ['skia_os != "win"', {
         'sources/': [ ['exclude', '_win.(h|cpp)$'],
@@ skipping 85 matching lines @@
         '../include/gpu',
         '../include/private',
         '../src/core',
         '../src/gpu',
         '../src/image/',
       ],
       'sources': [
         '<@(skgpu_sources)',
         '<@(skgpu_native_gl_sources)',
         '<@(skgpu_angle_gl_sources)',
+        '<@(skgpu_command_buffer_gl_sources)',
         '<@(skgpu_mesa_gl_sources)',
         '<@(skgpu_debug_gl_sources)',
         '<@(skgpu_null_gl_sources)',
         'gpu.gypi', # Makes the gypi appear in IDEs (but does not modify the build).
       ],
       'conditions': [
         [ 'skia_gpu_extra_dependency_path', {
           'dependencies' : [
               '<(skia_gpu_extra_dependency_path):*',
           ],
@@ skipping 88 matching lines @@
             'angle.gyp:*',
           ],
           'export_dependent_settings': [
             'angle.gyp:*',
           ],
         }, { # not skia_angle
           'sources!': [
             '<@(skgpu_angle_gl_sources)',
           ],
         }],
+        [ 'skia_command_buffer', {
+        }, { # not skia_command_buffer
+          'sources!': [
+            '<@(skgpu_command_buffer_gl_sources)',
+          ],
+        }],
         [ 'skia_os == "android"', {
           'sources!': [
             '../src/gpu/gl/GrGLDefaultInterface_none.cpp',
             '../src/gpu/gl/GrGLCreateNativeInterface_none.cpp',
           ],
           'defines': [
             'GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE=1',
           ],
           'link_settings': {
             'libraries': [
               '-lGLESv2',
               '-lEGL',
             ],
           },
         }],
       ],
     },
   ],
 }