Avoid planar YUV resources when one component EGL images are not supported

gpu/command_buffer/service/gles2_cmd_decoder.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/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 3575 matching lines @@
   caps.texture_format_bgra8888 =
       feature_info_->feature_flags().ext_texture_format_bgra8888;
   caps.texture_format_dxt1 =
       feature_info_->feature_flags().ext_texture_format_dxt1;
   caps.texture_format_dxt5 =
       feature_info_->feature_flags().ext_texture_format_dxt5;
   caps.texture_format_etc1 =
       feature_info_->feature_flags().oes_compressed_etc1_rgb8_texture;
   caps.texture_format_etc1_npot =
       caps.texture_format_etc1 && !workarounds().etc1_power_of_two_only;
+  caps.force_software_yuv_conversion =

[no sievers, 2016/08/24 22:39:18]

nit: Instead of 'force_software_yuv_conversion' maybe we can come up with a
better name that doesn't imply a prescription with knowledge about the client
pipeline, but rather is a simple feature (or feature broken) flag that says
something about the driver capabilities.

How about saying that 'shared (as in across contexts with a mailbox) one
component textures' cannot be used?

[Tobias Sargeant, 2016/08/26 15:52:11]

Done.

+      mailbox_manager()->UsesSync() &&

[no sievers, 2016/08/24 22:39:18]

nit: can you put a comment to explain why we only need to do it for
'UsesSync()'?

[Tobias Sargeant, 2016/08/26 15:52:11]

Done.

+      workarounds().avoid_one_component_egl_images;
   caps.texture_rectangle = feature_info_->feature_flags().arb_texture_rectangle;
   caps.texture_usage = feature_info_->feature_flags().angle_texture_usage;
   caps.texture_storage = feature_info_->feature_flags().ext_texture_storage;
   caps.discard_framebuffer =
       feature_info_->feature_flags().ext_discard_framebuffer;
   caps.sync_query = feature_info_->feature_flags().chromium_sync_query;
 
   caps.chromium_image_rgb_emulation = ChromiumImageNeedsRGBEmulation();
 #if defined(OS_MACOSX)
   // This is unconditionally true on mac, no need to test for it at runtime.
@@ skipping 14137 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu