Fix transform feedback bugs

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 4519 matching lines @@
       glGenBuffersARB(1, &service_id);
       CreateBuffer(client_id, service_id);
       buffer = GetBuffer(client_id);
     }
   }
   LogClientServiceForInfo(buffer, client_id, "glBindBufferBase");
   if (buffer) {
     // TODO(kbr): track indexed bound buffers.
     service_id = buffer->service_id();
   }
+  state_.SetBoundBuffer(target, buffer);

[Zhenyao Mo, 2016/03/02 17:09:36]

You will need to do all the validations before you can cache the state.

[qiankun, 2016/03/03 10:14:15]

The validations have been done in client side. Do we need to do them again?

   glBindBufferBase(target, index, service_id);
 }
 
 void GLES2DecoderImpl::DoBindBufferRange(GLenum target, GLuint index,
                                          GLuint client_id,
                                          GLintptr offset,
                                          GLsizeiptr size) {
   Buffer* buffer = NULL;
   GLuint service_id = 0;
   if (client_id != 0) {
@@ skipping 11197 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu