Bug 1576551 - AUTO_PROFILER_STATS(locked_profiler_stream_json_for_this_process) - r=gregtatum

Add some stats (off by default) around streaming JSON, as the following patches
may affect it.

Differential Revision: https://phabricator.services.mozilla.com/D44952

--HG--
extra : moz-landing-system : lando

mozglue/baseprofiler/core/platform.cpp

@@ -1607,6 +1607,8 @@ static void locked_profiler_stream_json_for_this_process(
 
   MOZ_RELEASE_ASSERT(CorePS::Exists() && ActivePS::Exists(aLock));
 
+  AUTO_PROFILER_STATS(base_locked_profiler_stream_json_for_this_process);
+
   double collectionStart = profiler_time();
 
   ProfileBuffer& buffer = ActivePS::Buffer(aLock);

tools/profiler/core/platform.cpp

@@ -2109,6 +2109,8 @@ static void locked_profiler_stream_json_for_this_process(
 
   MOZ_RELEASE_ASSERT(CorePS::Exists() && ActivePS::Exists(aLock));
 
+  AUTO_PROFILER_STATS(locked_profiler_stream_json_for_this_process);
+
   double collectionStart = profiler_time();
 
   ProfileBuffer& buffer = ActivePS::Buffer(aLock);