Fix transform feedback bugs

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 146791ccd59551da9e795c7aec485cd95f1a825b..9e2759bf64753d4f94a09254d555ee30ca9bb33b 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -4537,6 +4537,7 @@ void GLES2DecoderImpl::DoBindBufferBase(GLenum target, GLuint index,
     // 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);
 }