Add GL_ANGLE_pack_reverse_row_order to command buffer

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2011 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 <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 5783 matching lines @@
 }
 
 error::Error GLES2DecoderImpl::HandlePixelStorei(
     uint32 immediate_data_size, const gles2::PixelStorei& c) {
   GLenum pname = c.pname;
   GLenum param = c.param;
   if (!validators_->pixel_store.IsValid(pname)) {
     SetGLError(GL_INVALID_ENUM, "glPixelStorei: pname GL_INVALID_ENUM");
     return error::kNoError;
   }
-  if (!validators_->pixel_store_alignment.IsValid(param)) {
-    SetGLError(GL_INVALID_VALUE, "glPixelSTore: param GL_INVALID_VALUE");
-    return error::kNoError;
+  switch (pname) {
+    case GL_PACK_ALIGNMENT:
+    case GL_UNPACK_ALIGNMENT:
+        if (!validators_->pixel_store_alignment.IsValid(param)) {
+            SetGLError(GL_INVALID_VALUE,
+                       "glPixelSTore: param GL_INVALID_VALUE");
+            return error::kNoError;
+        }
+    default:
+        break;
   }
   glPixelStorei(pname, param);
   switch (pname) {
   case GL_PACK_ALIGNMENT:
       pack_alignment_ = param;
       break;
+  case GL_PACK_REVERSE_ROW_ORDER_ANGLE:
+      break;
   case GL_UNPACK_ALIGNMENT:
       unpack_alignment_ = param;
       break;
   default:
       // Validation should have prevented us from getting here.
       NOTREACHED();
       break;
   }
   return error::kNoError;
 }
@@ skipping 1852 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 "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu