linux: fix uninitialized variable

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 72f27852a1e4def7c096f1e0a3e39a2a171f0f6d..8b1fcf5bbf6a3ad03d9818e50979cae4a50b90cf 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -982,7 +982,7 @@ parse_error::ParseError GLES2DecoderImpl::DoCommand(
     unsigned int command,
     unsigned int arg_count,
     const void* cmd_data) {
-  parse_error::ParseError result;
+  parse_error::ParseError result = parse_error::kParseNoError;
   if (debug()) {
     // TODO(gman): Change output to something useful for NaCl.
     printf("cmd: %s\n", GetCommandName(command));