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 2f6d11bdf44566b0b1c60c7df0b34896967b990d..5dc540637fab23f522b7dfaa941e3ec917e73be4 100644
--- a/chrome/browser/metrics/thread_watcher.cc
+++ b/chrome/browser/metrics/thread_watcher.cc
@@ -534,7 +534,9 @@ void ThreadWatcherList::ParseCommandLine(
     uint32* unresponsive_threshold,
     CrashOnHangThreadMap* crash_on_hang_threads) {
   // Initialize |unresponsive_threshold| to a default value.
-  *unresponsive_threshold = kUnresponsiveCount;
+  // 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;
 
   // Increase the unresponsive_threshold on the Stable and Beta channels to
   // reduce the number of crashes due to ThreadWatcher.