Add GL_ANGLE_pack_reverse_row_order to command buffer

gpu/command_buffer/service/feature_info.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 
 #include <string>
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/gles2_cmd_validation.h"
 
 namespace gpu {
 namespace gles2 {
 
 // FeatureInfo records the features that are available for a particular context.
 class FeatureInfo {
  public:
   struct FeatureFlags {
     FeatureFlags()
         : chromium_framebuffer_multisample(false),
           oes_standard_derivatives(false),
           oes_egl_image_external(false),
           npot_ok(false),
           enable_texture_float_linear(false),
           enable_texture_half_float_linear(false),
           chromium_webglsl(false),
           chromium_stream_texture(false),
           angle_translated_shader_source(false),
+          angle_pack_reverse_row_order(false),
           arb_texture_rectangle(false) {
     }
 
     bool chromium_framebuffer_multisample;
     bool oes_standard_derivatives;
     bool oes_egl_image_external;
     bool npot_ok;
     bool enable_texture_float_linear;
     bool enable_texture_half_float_linear;
     bool chromium_webglsl;
     bool chromium_stream_texture;
     bool angle_translated_shader_source;
+    bool angle_pack_reverse_row_order;
     bool arb_texture_rectangle;
   };
 
   FeatureInfo();
   ~FeatureInfo();
 
   // If allowed features = NULL or "*", all features are allowed. Otherwise
   // only features that match the strings in allowed_features are allowed.
   bool Initialize(const char* allowed_features);
   bool Initialize(const DisallowedFeatures& disallowed_features,
@@ skipping 30 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_