Implement GetIntegerv(SAMPLER_BINDING/TRANSFORM_FEEDBACK_BINDING) in command buffer.

gpu/command_buffer/service/transform_feedback_manager.h

 // Copyright (c) 2016 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_TRANSFORM_FEEDBACK_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_TRANSFORM_FEEDBACK_MANAGER_H_
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/indexed_buffer_binding_host.h"
 #include "gpu/gpu_export.h"
 
 namespace gpu {
 namespace gles2 {
 
 class Buffer;
 class TransformFeedbackManager;
 
 // Info about TransformFeedbacks currently in the system.
 class GPU_EXPORT TransformFeedback : public IndexedBufferBindingHost {
  public:
-  TransformFeedback(TransformFeedbackManager* manager, GLuint service_id);
+  TransformFeedback(
+      TransformFeedbackManager* manager, GLuint client_id, GLuint service_id);
 
   // All the following functions do state update and call the underlying GL
   // function.  All validations have been done already and the GL function is
   // guaranteed to succeed.
   void DoBindTransformFeedback(GLenum target);
   void DoBeginTransformFeedback(GLenum primitive_mode);
   void DoEndTransformFeedback();
   void DoPauseTransformFeedback();
   void DoResumeTransformFeedback();
 
+  GLuint client_id() const {
+    return client_id_;
+  }
+
   GLuint service_id() const {
     return service_id_;
   }
 
   bool has_been_bound() const {
     return has_been_bound_;
   }
 
   bool active() const {
     return active_;
   }
 
   bool paused() const {
     return paused_;
   }
 
   GLenum primitive_mode() const {
     return primitive_mode_;
   }
 
  private:
   ~TransformFeedback() override;
 
   // The manager that owns this Buffer.
   TransformFeedbackManager* manager_;
 
+  GLuint client_id_;
   GLuint service_id_;
 
   bool has_been_bound_;
 
   bool active_;
   bool paused_;
 
   GLenum primitive_mode_;
 };
 
@@ skipping 46 matching lines @@
   bool needs_emulation_;
   bool lost_context_;
 
   DISALLOW_COPY_AND_ASSIGN(TransformFeedbackManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TRANSFORM_FEEDBACK_MANAGER_H_