Bug 1500523 - Increase DMD timeout. r=njn

This bumps the timeout when waiting for reports to 180 seconds which seems to
be long enough for MacOS in automation.

--HG--
extra : rebase_source : 6eb396e53bd37f6640b7c5402fb997c73af40d99

testing/awsy/awsy/awsy_test_case.py

@@ -255,7 +255,7 @@ class AwsyTestCase(MarionetteTestCase):
             self.marionette.execute_script(dmd_script, script_timeout=60000)
             tmpdir = tempfile.gettempdir()
             prefix = "incomplete-unified-memory-report-%s-%d-*" % (checkpointName, iteration)
-            max_wait = 60
+            max_wait = 240
             elapsed = 0
             while fnmatch.filter(os.listdir(tmpdir), prefix) and elapsed < max_wait:
                 self.logger.info("Waiting for memory report to finish")

xpcom/base/nsMemoryReporterManager.h

@@ -206,7 +206,7 @@ private:
   static void TimeoutCallback(nsITimer* aTimer, void* aData);
   // Note: this timeout needs to be long enough to allow for the
   // possibility of DMD reports and/or running on a low-end phone.
-  static const uint32_t kTimeoutLengthMS = 50000;
+  static const uint32_t kTimeoutLengthMS = 180000;
 
   mozilla::Mutex mMutex;
   bool mIsRegistrationBlocked;