Reland "[cpu-profiler] Turn on detailed line info for optimized code"

This is a reland of 898f880

Original change's description:
> [cpu-profiler] Turn on detailed line info for optimized code
> 
> Cautiously turn on this flag by default to check the impact on
> performance bots. Could show minor regressions in old space and/or
> code_and_metadata memory buckets.
> 
> Bug: v8:7983
> Change-Id: Ic4369cdb0231f4f88eada699da948e8bb48a25fd
> Reviewed-on: https://chromium-review.googlesource.com/1162234
> Commit-Queue: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#54908}

Bug: v8:7983
Change-Id: Iff53bc19c92f26f386948bd4a58e8dcf0493cf0d
Reviewed-on: https://chromium-review.googlesource.com/1177481
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55156}

Author: psmarshall

src/flag-definitions.h

@@ -1257,9 +1257,8 @@ DEFINE_BOOL(log_function_events, false,
 DEFINE_BOOL(prof, false,
             "Log statistical profiling information (implies --log-code).")
 
-DEFINE_BOOL(detailed_line_info, false,
+DEFINE_BOOL(detailed_line_info, true,
             "Always generate detailed line information for CPU profiling.")
-DEFINE_IMPLICATION(future, detailed_line_info)
 
 #if defined(ANDROID)
 // Phones and tablets have processors that are much slower than desktop