Revert of Fix EXT_draw_buffers detection on some GL ES 3 contexts

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 <memory>
 #include <string>
 
@@ skipping 52 matching lines @@
     bool use_arb_occlusion_query_for_occlusion_query_boolean = false;
     bool native_vertex_array_object = false;
     bool ext_texture_format_astc = false;
     bool ext_texture_format_atc = false;
     bool ext_texture_format_bgra8888 = false;
     bool ext_texture_format_dxt1 = false;
     bool ext_texture_format_dxt5 = false;
     bool enable_shader_name_hashing = false;
     bool enable_samplers = false;
     bool ext_draw_buffers = false;
+    bool nv_draw_buffers = false;
     bool ext_frag_depth = false;
     bool ext_shader_texture_lod = false;
     bool use_async_readpixels = false;
     bool map_buffer_range = false;
     bool ext_discard_framebuffer = false;
     bool angle_depth_texture = false;
     bool is_swiftshader_for_webgl = false;
     bool angle_texture_usage = false;
     bool ext_texture_storage = false;
     bool chromium_path_rendering = false;
@@ skipping 121 matching lines @@
   bool disable_shader_translator_;
   std::unique_ptr<gl::GLVersionInfo> gl_version_info_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_