gpu: Add YCbCr 420v extension.

gpu/command_buffer/service/feature_info.cc

 // 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.
 
 #include "gpu/command_buffer/service/feature_info.h"
 
 #include <set>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 153 matching lines @@
       map_buffer_range(false),
       ext_discard_framebuffer(false),
       angle_depth_texture(false),
       is_swiftshader(false),
       angle_texture_usage(false),
       ext_texture_storage(false),
       chromium_path_rendering(false),
       blend_equation_advanced(false),
       blend_equation_advanced_coherent(false),
       ext_texture_rg(false),
+      chromium_image_ycbcr_420v(false),
       chromium_image_ycbcr_422(false),
       enable_subscribe_uniform(false),
       emulate_primitive_restart_fixed_index(false),
       ext_render_buffer_format_bgra8888(false) {}
 
 FeatureInfo::Workarounds::Workarounds() :
 #define GPU_OP(type, name) name(false),
     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
 #undef GPU_OP
     max_texture_size(0),
@@ skipping 652 matching lines @@
     // textures via glFramebufferTexture2D, and copy destinations via
     // glCopyPixels.
     validators_.texture_bind_target.AddValue(GL_TEXTURE_RECTANGLE_ARB);
     validators_.texture_target.AddValue(GL_TEXTURE_RECTANGLE_ARB);
     validators_.get_tex_param_target.AddValue(GL_TEXTURE_RECTANGLE_ARB);
     validators_.g_l_state.AddValue(GL_TEXTURE_BINDING_RECTANGLE_ARB);
   }
 
 #if defined(OS_MACOSX)
   AddExtensionString("GL_CHROMIUM_iosurface");
+  AddExtensionString("GL_CHROMIUM_ycbcr_420v_image");
+  feature_flags_.chromium_image_ycbcr_420v = true;
 #endif
 
   if (extensions.Contains("GL_APPLE_ycbcr_422")) {
     AddExtensionString("GL_CHROMIUM_ycbcr_422_image");
     feature_flags_.chromium_image_ycbcr_422 = true;
   }
 
   // TODO(gman): Add support for these extensions.
   //     GL_OES_depth32
 
@@ skipping 375 matching lines @@
   if (pos == std::string::npos) {
     extensions_ += (extensions_.empty() ? "" : " ") + str;
   }
 }
 
 FeatureInfo::~FeatureInfo() {
 }
 
 }  // namespace gles2
 }  // namespace gpu