Avoid EGLImage target texture reuse on PowerVR

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 22 matching lines @@
   NativeImageBuffer() {}
   virtual ~NativeImageBuffer() {}
 
   DISALLOW_COPY_AND_ASSIGN(NativeImageBuffer);
 };
 
 // An immutable description that can be used to create a texture that shares
 // the underlying image buffer(s).
 class TextureDefinition {
  public:
+  static void AvoidEGLTargetTextureReuse();
+
   TextureDefinition();
   TextureDefinition(Texture* texture,
                     unsigned int version,
                     const scoped_refptr<NativeImageBuffer>& image);
   virtual ~TextureDefinition();
 
   Texture* CreateTexture() const;
   void UpdateTexture(Texture* texture) const;
 
   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;
+  void UpdateTextureInternal(Texture* texture) const;
 
   struct LevelInfo {
     LevelInfo();
     LevelInfo(GLenum target,
               GLenum internal_format,
               GLsizei width,
               GLsizei height,
               GLsizei depth,
               GLint border,
               GLenum format,
@@ skipping 24 matching lines @@
   bool defined_;
 
   // Only support textures with one face and one level.
   LevelInfo level_info_;
 };
 
 }  // namespage gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TEXTURE_DEFINITION_H_