WebGL: tex(Sub)Image(2D|3D) texImageSource support for RGB10_A2 textures.

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 16515 matching lines @@
     case GL_R8UI:
     case GL_RG8:
     case GL_RG8UI:
     case GL_SRGB8:
     case GL_RGB565:
     case GL_RGB8UI:
     case GL_SRGB8_ALPHA8:
     case GL_RGB5_A1:
     case GL_RGBA4:
     case GL_RGBA8UI:
+    case GL_RGB10_A2:
       valid_dest_format = feature_info_->IsWebGL2OrES3Context();
       break;
     case GL_RGB9_E5:
     case GL_R16F:
     case GL_R32F:
     case GL_RG16F:
     case GL_RG32F:
     case GL_RGB16F:
     case GL_RGBA16F:
     case GL_R11F_G11F_B10F:
@@ skipping 3029 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