Allow creating GLImage-backed textures with glTexStorage2D.

gpu/command_buffer/service/image_factory.h

 // Copyright 2014 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_IMAGE_FACTORY_H_
 #define GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_
 
 #include "base/memory/ref_counted.h"
 #include "gpu/gpu_export.h"
 #include "gpu/ipc/common/surface_handle.h"
@@ skipping 19 matching lines @@
       gfx::BufferFormat format,
       unsigned internalformat,
       int client_id,
       SurfaceHandle surface_handle) = 0;
 
   // Create an anonymous GLImage backed by a GpuMemoryBuffer that doesn't have a
   // client_id. It can't be passed to other processes.
   virtual scoped_refptr<gl::GLImage> CreateAnonymousImage(
       const gfx::Size& size,
       gfx::BufferFormat format,
+      gfx::BufferUsage usage,
       unsigned internalformat);
 
   // An image can only be bound to a texture with the appropriate type.
   virtual unsigned RequiredTextureType();
 
   // Whether a created image can have format GL_RGB.
   virtual bool SupportsFormatRGB();
 
  protected:
   virtual ~ImageFactory();
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IMAGE_FACTORY_H_