Reland of Extend CopyTextureCHROMIUM to more ES 3.0 texture formats.

gpu/command_buffer/service/feature_info.h

Index: gpu/command_buffer/service/feature_info.h
diff --git a/gpu/command_buffer/service/feature_info.h b/gpu/command_buffer/service/feature_info.h
index d72dfc17aa9ba97c72260672e9a3c9ecdcd7fdd2..8c6a96ed22a63d65d668dfb46645abb1fe2eebc4 100644
--- a/gpu/command_buffer/service/feature_info.h
+++ b/gpu/command_buffer/service/feature_info.h
@@ -169,6 +169,12 @@ class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
     return oes_texture_float_linear_available_;
   }
 
+  bool texture_format_bgra8888_available() const {
+    return texture_format_bgra8888_available_;
+  }
+
+  bool ext_srgb_available() const { return ext_srgb_available_; }
+
  private:
   friend class base::RefCounted<FeatureInfo>;
   friend class BufferManagerClientSideArraysTest;
@@ -197,6 +203,8 @@ class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
   bool ext_color_buffer_float_available_;
   bool oes_texture_float_linear_available_;
   bool oes_texture_half_float_linear_available_;
+  bool texture_format_bgra8888_available_;

[Zhenyao Mo, 2016/11/19 00:42:32]

This is the wrong place for these two flags.

The above three indicate that they are available but *NOT* enabled (so WebGL can
dynamically enable them)

What you need is two flags to be part of feature_flags_ (and I think you already
have one, so only need to add the ext_srgb

[qiankun, 2016/11/21 16:01:50]

Yes. Thanks for pointing this. Follow your suggestions.

+  bool ext_srgb_available_;
 
   bool disable_shader_translator_;
   std::unique_ptr<gl::GLVersionInfo> gl_version_info_;