optimize precision for conversion from srgb to linear

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 9038ca8222977b6f9b223879ea10a7a0eb264368..8bf0d8fda95fd6006bcbede2746c4723fb33500f 100644
--- a/gpu/command_buffer/service/feature_info.h
+++ b/gpu/command_buffer/service/feature_info.h
@@ -161,6 +161,10 @@ class GPU_EXPORT FeatureInfo : public base::RefCounted<FeatureInfo> {
   void EnableOESTextureFloatLinear();
   void EnableOESTextureHalfFloatLinear();
 
+  bool ext_color_buffer_float_available() const {
+    return ext_color_buffer_float_available_;
+  }
+
  private:
   friend class base::RefCounted<FeatureInfo>;
   friend class BufferManagerClientSideArraysTest;