optimize precision for conversion from srgb to linear

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 143 matching lines @@
   bool IsWebGLContext() const;
   bool IsWebGL1OrES2Context() const;
   bool IsWebGL2OrES3Context() const;
 
   void EnableCHROMIUMColorBufferFloatRGBA();
   void EnableCHROMIUMColorBufferFloatRGB();
   void EnableEXTColorBufferFloat();
   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;
 
   ~FeatureInfo();
 
   void AddExtensionString(const char* s);
   void InitializeBasicState(const base::CommandLine* command_line);
   void InitializeFeatures();
 
@@ skipping 24 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_