Refactor CommandBufferHelper to use Jump to loop...

gpu/command_buffer/service/cmd_parser.cc

Index: gpu/command_buffer/service/cmd_parser.cc
===================================================================
--- gpu/command_buffer/service/cmd_parser.cc	(revision 48721)
+++ gpu/command_buffer/service/cmd_parser.cc	(working copy)
@@ -58,7 +58,11 @@
   if (result != error::kNoError) {
     ReportError(header.command, result);
   }
-  get_ = (get + header.size) % entry_count_;
+
+  // If get was not set somewhere else advance it.
+  if (get == get_) {
+    get_ = (get + header.size) % entry_count_;
+  }
   return result;
 }