Add support for all blendmodes if we have GL_KHR_blend_equation_advanced.

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"
@@ skipping 54 matching lines @@
     bool use_async_readpixels;
     bool map_buffer_range;
     bool ext_discard_framebuffer;
     bool angle_depth_texture;
     bool is_angle;
     bool is_swiftshader;
     bool angle_texture_usage;
     bool ext_texture_storage;
     bool chromium_path_rendering;
     bool ext_blend_minmax;
+    bool blend_equation_advanced;
+    bool blend_equation_advanced_coherent;
   };
 
   struct Workarounds {
     Workarounds();
 
 #define GPU_OP(type, name) bool name;
     GPU_DRIVER_BUG_WORKAROUNDS(GPU_OP)
 #undef GPU_OP
 
     // Note: 0 here means use driver limit.
@@ skipping 60 matching lines @@
   // Flags for Workarounds.
   Workarounds workarounds_;
 
   DISALLOW_COPY_AND_ASSIGN(FeatureInfo);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FEATURE_INFO_H_