Add GL_EXT_color_buffer_half_float support

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 35 matching lines @@
     bool oes_standard_derivatives = false;
     bool oes_egl_image_external = false;
     bool nv_egl_stream_consumer_external = false;
     bool oes_depth24 = false;
     bool oes_compressed_etc1_rgb8_texture = false;
     bool packed_depth24_stencil8 = false;
     bool npot_ok = false;
     bool enable_texture_float_linear = false;
     bool enable_texture_half_float_linear = false;
     bool enable_color_buffer_float = false;
+    bool enable_color_buffer_half_float = false;
     bool angle_translated_shader_source = false;
     bool angle_pack_reverse_row_order = false;
     bool arb_texture_rectangle = false;
     bool angle_instanced_arrays = false;
     bool occlusion_query = false;
     bool occlusion_query_boolean = false;
     bool use_arb_occlusion_query2_for_occlusion_query_boolean = false;
     bool use_arb_occlusion_query_for_occlusion_query_boolean = false;
     bool native_vertex_array_object = false;
     bool ext_texture_format_astc = false;
@@ skipping 94 matching lines @@
 
   bool disable_shader_translator() const { return disable_shader_translator_; }
 
   bool IsWebGLContext() const;
   bool IsWebGL1OrES2Context() const;
   bool IsWebGL2OrES3Context() const;
 
   void EnableCHROMIUMColorBufferFloatRGBA();
   void EnableCHROMIUMColorBufferFloatRGB();
   void EnableEXTColorBufferFloat();
+  void EnableEXTColorBufferHalfFloat();
   void EnableOESTextureFloatLinear();
   void EnableOESTextureHalfFloatLinear();
 
   bool ext_color_buffer_float_available() const {
     return ext_color_buffer_float_available_;
   }
 
   bool oes_texture_float_linear_available() const {
     return oes_texture_float_linear_available_;
   }
 
  private:
   friend class base::RefCounted<FeatureInfo>;
   friend class BufferManagerClientSideArraysTest;
+  class StringSet;
 
   ~FeatureInfo();
 
   void AddExtensionString(const char* s);
   void InitializeBasicState(const base::CommandLine* command_line);
   void InitializeFeatures();
+  void InitializeFloatAndHalfFloatFeatures(const StringSet& extensions);
 
   Validators validators_;
 
   DisallowedFeatures disallowed_features_;
 
   ContextType context_type_;
 
   // The extensions string returned by glGetString(GL_EXTENSIONS);
   std::string extensions_;
 
@@ skipping 10 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_