Fix a bug in shader/program relationship.

gpu/command_buffer/service/program_manager.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_PROGRAM_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 551 matching lines @@
   FragmentInputInfoVector fragment_input_infos_;
   FragmentInputLocationVector fragment_input_locations_;
 
   ProgramOutputInfoVector program_output_infos_;
 
   // The program this Program is tracking.
   GLuint service_id_;
 
   // Shaders by type of shader.
   scoped_refptr<Shader> attached_shaders_[kMaxAttachedShaders];
+  scoped_refptr<Shader> shaders_from_last_successful_link_[kMaxAttachedShaders];
 
   // True if this program is marked as deleted.
   bool deleted_;
 
   // This is true if glLinkProgram was successful at least once.
   bool valid_;
 
   // This is true if glLinkProgram was successful last time it was called.
   bool link_status_;
 
@@ skipping 155 matching lines @@
 };
 
 inline const FeatureInfo& Program::feature_info() const {
   return *manager_->feature_info_.get();
 }
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_