Add GL_EXT_multisampled_render_to_texture support to command buffer.

gpu/command_buffer/service/feature_info.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_
 
 #include <set>
 #include <string>
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/sys_info.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/gles2_cmd_validation.h"
 #include "gpu/config/gpu_driver_bug_workaround_type.h"
 #include "gpu/gpu_export.h"
 
 class CommandLine;
 
 namespace gpu {
 namespace gles2 {
 
 // FeatureInfo records the features that are available for a ContextGroup.
 class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
  public:
   struct FeatureFlags {
     FeatureFlags();
 
     bool chromium_framebuffer_multisample;
+    bool multisampled_render_to_texture;
+    // Use the IMG GLenum values and functions rather than EXT.
+    bool use_img_for_multisampled_render_to_texture;
     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_stream_texture;
     bool angle_translated_shader_source;
     bool angle_pack_reverse_row_order;
     bool arb_texture_rectangle;
     bool angle_instanced_arrays;
@@ skipping 76 matching lines @@
   // Flags for Workarounds.
   Workarounds workarounds_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_