Revert of Increase ThreadWatcher unresponsive threashold to 72 secs in dev

chrome/browser/metrics/thread_watcher.cc

Index: chrome/browser/metrics/thread_watcher.cc
diff --git a/chrome/browser/metrics/thread_watcher.cc b/chrome/browser/metrics/thread_watcher.cc
index 5dc540637fab23f522b7dfaa941e3ec917e73be4..2f6d11bdf44566b0b1c60c7df0b34896967b990d 100644
--- a/chrome/browser/metrics/thread_watcher.cc
+++ b/chrome/browser/metrics/thread_watcher.cc
@@ -534,9 +534,7 @@
     uint32* unresponsive_threshold,
     CrashOnHangThreadMap* crash_on_hang_threads) {
   // Initialize |unresponsive_threshold| to a default value.
-  // TODO(rtenneti): Changed the default value to 4 times, until we can triage
-  // hangs automatically (and to reduce the crash dumps).
-  *unresponsive_threshold = kUnresponsiveCount * 4;
+  *unresponsive_threshold = kUnresponsiveCount;
 
   // Increase the unresponsive_threshold on the Stable and Beta channels to
   // reduce the number of crashes due to ThreadWatcher.