Update from https://crrev.com/314320

gpu/command_buffer/service/texture_definition.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_TEXTURE_DEFINITION_H_
 #define GPU_COMMAND_BUFFER_SERVICE_TEXTURE_DEFINITION_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 40 matching lines @@
 
   unsigned int version() const { return version_; }
   bool IsOlderThan(unsigned int version) const {
     return (version - version_) < 0x80000000;
   }
   bool Matches(const Texture* texture) const;
 
   scoped_refptr<NativeImageBuffer> image() const { return image_buffer_; }
 
  private:
+  bool SafeToRenderFrom() const;
+
   struct LevelInfo {
     LevelInfo(GLenum target,
               GLenum internal_format,
               GLsizei width,
               GLsizei height,
               GLsizei depth,
               GLint border,
               GLenum format,
               GLenum type,
               bool cleared);
@@ skipping 21 matching lines @@
   GLenum wrap_t_;
   GLenum usage_;
   bool immutable_;
   LevelInfos level_infos_;
 };
 
 }  // namespage gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TEXTURE_DEFINITION_H_