Adds support for the GL_ANGLE_texture_usage and GL_EXT_texture_storage

gpu/command_buffer/service/texture_manager.h

 // Copyright (c) 2011 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_TEXTURE_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 
 #include <vector>
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
@@ skipping 22 matching lines @@
     explicit TextureInfo(GLuint service_id)
         : service_id_(service_id),
           deleted_(false),
           cleared_(true),
           num_uncleared_mips_(0),
           target_(0),
           min_filter_(GL_NEAREST_MIPMAP_LINEAR),
           mag_filter_(GL_LINEAR),
           wrap_s_(GL_REPEAT),
           wrap_t_(GL_REPEAT),
+          usage_(GL_NONE),
           max_level_set_(-1),
           texture_complete_(false),
           cube_complete_(false),
           npot_(false),
           has_been_bound_(false),
           framebuffer_attachment_count_(0),
           owned_(true),
           stream_texture_(false) {
     }
 
     GLenum min_filter() const {
       return min_filter_;
     }
 
     GLenum mag_filter() const {
       return mag_filter_;
     }
 
     GLenum wrap_s() const {
       return wrap_s_;
     }
 
     GLenum wrap_t() const {
       return wrap_t_;
     }
 
+    GLenum usage() const {
+      return usage_;
+    }
+
     int num_uncleared_mips() const {
       return num_uncleared_mips_;
     }
 
     // True if this texture meets all the GLES2 criteria for rendering.
     // See section 3.8.2 of the GLES2 spec.
     bool CanRender(const FeatureInfo* feature_info) const;
 
     bool CanRenderTo() const {
       return !stream_texture_ && target_ != GL_TEXTURE_EXTERNAL_OES;
@@ skipping 196 matching lines @@
     int num_uncleared_mips_;
 
     // The target. 0 if unset, otherwise GL_TEXTURE_2D or GL_TEXTURE_CUBE_MAP.
     GLenum target_;
 
     // Texture parameters.
     GLenum min_filter_;
     GLenum mag_filter_;
     GLenum wrap_s_;
     GLenum wrap_t_;
+    GLenum usage_;
 
     // The maximum level that has been set.
     GLint max_level_set_;
 
     // Whether or not this texture is "texture complete"
     bool texture_complete_;
 
     // Whether or not this texture is "cube complete"
     bool cube_complete_;
 
@@ skipping 190 matching lines @@
   TextureInfo::Ref default_texture_external_oes_;
   TextureInfo::Ref default_texture_rectangle_arb_;
 
   DISALLOW_COPY_AND_ASSIGN(TextureManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_