Turn on parallel recompilation.

R=jkummerow@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/17394002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15193 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flag-definitions.h

@@ -290,10 +290,10 @@ DEFINE_bool(opt_safe_uint32_operations, true,
             "allow uint32 values on optimize frames if they are used only in "
             "safe operations")
 
-DEFINE_bool(parallel_recompilation, false,
+DEFINE_bool(parallel_recompilation, true,
             "optimizing hot functions asynchronously on a separate thread")
 DEFINE_bool(trace_parallel_recompilation, false, "track parallel recompilation")
-DEFINE_int(parallel_recompilation_queue_length, 3,
+DEFINE_int(parallel_recompilation_queue_length, 8,
            "the length of the parallel compilation queue")
 DEFINE_int(parallel_recompilation_delay, 0,
            "artificial compilation delay in ms")