Clean up of GLES2 Command Decoder by moving some of the error state into a separate class.

gpu/command_buffer/service/gles2_cmd_decoder_autogen.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.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // DO NOT EDIT!
 
 // It is included by gles2_cmd_decoder.cc
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_AUTOGEN_H_
@@ skipping 1030 matching lines @@
   return error::kNoError;
 }
 error::Error GLES2DecoderImpl::HandleGetError(
     uint32 immediate_data_size, const gles2::cmds::GetError& c) {
   typedef cmds::GetError::Result Result;
   Result* result_dst = GetSharedMemoryAs<Result*>(
       c.result_shm_id, c.result_shm_offset, sizeof(*result_dst));
   if (!result_dst) {
     return error::kOutOfBounds;
   }
-  *result_dst = GetGLError();
+  *result_dst = GetErrorState()->GetGLError();
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleGetFloatv(
     uint32 immediate_data_size, const gles2::cmds::GetFloatv& c) {
   GLenum pname = static_cast<GLenum>(c.pname);
   typedef cmds::GetFloatv::Result Result;
   GLsizei num_values = 0;
   GetNumValuesReturnedForGLGet(pname, &num_values);
   Result* result = GetSharedMemoryAs<Result*>(
@@ skipping 2233 matching lines @@
         clear_state_dirty_ = true;
       }
       return false;
     default:
       NOTREACHED();
       return false;
   }
 }
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_AUTOGEN_H_