gpu: Remove unnecessary bit-shifts of 0.

Change-Id: I6f561871d9f41994519274731bb766dddcad20e9
Reviewed-on: https://chromium-review.googlesource.com/1113823Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570156}

gpu/command_buffer/common/cmd_buffer_common.h

@@ -25,8 +25,8 @@ namespace cmd {
 }  // namespace cmd
 
 // Pack & unpack Command cmd_flags
-#define CMD_FLAG_SET_TRACE_LEVEL(level)     ((level & 3) << 0)
-#define CMD_FLAG_GET_TRACE_LEVEL(cmd_flags) ((cmd_flags >> 0) & 3)
+#define CMD_FLAG_SET_TRACE_LEVEL(level)     (level & 3)
+#define CMD_FLAG_GET_TRACE_LEVEL(cmd_flags) (cmd_flags & 3)
 
 // Computes the number of command buffer entries needed for a certain size. In
 // other words it rounds up to a multiple of entries.