Update Phabricator to new PhutilServiceProfiler APIs

Summary:
Get rid of the Phabricator-level DarkConsole-specific API and use the more
general Phutil-level one.

Test Plan:
Loaded DarkConsole services plugin, viewed Diffusion, got execs in the trace.

Reviewed By: aran
Reviewers: aran, jungejason, tuomaspelkonen
CC: aran
Differential Revision: 293

scripts/repository/parse_one_commit.php

@@ -76,8 +76,6 @@ if (isset($argv[2]) && $argv[2] == '--herald') {
   $workers[] = new PhabricatorRepositoryCommitHeraldWorker($spec);
 }
 
-ExecFuture::pushEchoMode(true);
-
 foreach ($workers as $worker) {
   echo "Running ".get_class($worker)."...\n";
   $worker->doWork();