Improve sync object related command handling.

gpu/command_buffer/service/gles2_cmd_decoder_autogen.h

 // Copyright 2014 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
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 1400 matching lines @@
   const gles2::cmds::FenceSync& c =
       *static_cast<const gles2::cmds::FenceSync*>(cmd_data);
   (void)c;
   GLenum condition = static_cast<GLenum>(c.condition);
   GLbitfield flags = static_cast<GLbitfield>(c.flags);
   uint32_t client_id = c.client_id;
   GLsync service_id = 0;
   if (group_->GetSyncServiceId(client_id, &service_id)) {
     return error::kInvalidArguments;
   }
-  service_id = glFenceSync(condition, flags);
+  service_id = DoFenceSync(condition, flags);
   if (service_id) {
     group_->AddSyncId(client_id, service_id);
   }
   return error::kNoError;
 }
 
 error::Error GLES2DecoderImpl::HandleFinish(uint32_t immediate_data_size,
                                             const void* cmd_data) {
   const gles2::cmds::Finish& c =
       *static_cast<const gles2::cmds::Finish*>(cmd_data);
@@ skipping 796 matching lines @@
   if (values == NULL) {
     return error::kOutOfBounds;
   }
   LOCAL_COPY_REAL_GL_ERRORS_TO_WRAPPER("GetSynciv");
   // Check that the client initialized the result.
   if (result->size != 0) {
     return error::kInvalidArguments;
   }
   GLsync service_sync = 0;
   if (!group_->GetSyncServiceId(sync, &service_sync)) {
-    LOCAL_SET_GL_ERROR(GL_INVALID_OPERATION, "glGetSynciv", "invalid sync id");
+    LOCAL_SET_GL_ERROR(GL_INVALID_VALUE, "glGetSynciv", "invalid sync id");
     return error::kNoError;
   }
   glGetSynciv(service_sync, pname, num_values, nullptr, values);
   GLenum error = LOCAL_PEEK_GL_ERROR("GetSynciv");
   if (error == GL_NO_ERROR) {
     result->SetNumResults(num_values);
   }
   return error::kNoError;
 }
 
@@ skipping 3376 matching lines @@
         state_.enable_flags.cached_sample_alpha_to_one_ext = enabled;
         return true;
       }
       return false;
     default:
       NOTREACHED();
       return false;
   }
 }
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_DECODER_AUTOGEN_H_