[build] Provide a GN arg to enable call-graph-profile-sort

In Chrome OS, we need to enable call-graph-profile-sort for most
of the use cases, except when we are generating orderfiles. Thus
we have to use a flag to enable call-graph-profile-sort, when
it's needed. Hopefully this flag can also be useful when other
platforms find it useful to enable call-graph-profile-sort.

BUG=chromium:1117564
TEST=Tested locally for chromeos

Change-Id: I045cbeae058889f2b4f20fbfcd1994d45179bb9e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2364753
Commit-Queue: Tiancong Wang <tcwang@google.com>
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800344}

build/config/compiler/BUILD.gn

@@ -147,6 +147,10 @@ declare_args() {
        (is_win && target_cpu == "x86") || (is_win && target_cpu == "x64") ||
        (is_android && target_cpu == "arm") ||
        (is_android && target_cpu == "arm64"))
+
+  # Turn off the --call-graph-profile-sort flag for lld by default. Enable
+  # selectively for targets where it's beneficial.
+  enable_call_graph_profile_sort = false
 }
 
 declare_args() {
@@ -701,7 +705,7 @@ config("compiler") {
   # present. On Android this increases binary size due to more thinks for long
   # jumps. Turn it off by default and enable selectively for targets where it's
   # beneficial.
-  if (use_lld) {
+  if (use_lld && !enable_call_graph_profile_sort) {
     if (is_win) {
       ldflags += [ "/call-graph-profile-sort:no" ]
     } else {