commit 3c4493ef2e44
Author: Ben Kelly <ben@wanderview.com>
Date:   Tue Oct 10 13:50:36 2017 -0700

    Bug 1407245 - Fix service worker update 24-hour time check conversion from microseconds. r=asuth, a=ritu
    
    --HG--
    extra : source : 412da89cc8e754831e6942b55d3cfd0ea3f1c88b
---
 dom/workers/ServiceWorkerRegistrationInfo.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git dom/workers/ServiceWorkerRegistrationInfo.cpp dom/workers/ServiceWorkerRegistrationInfo.cpp
index 07b9726677cc..beca30d82387 100644
--- dom/workers/ServiceWorkerRegistrationInfo.cpp
+++ dom/workers/ServiceWorkerRegistrationInfo.cpp
@@ -346,14 +346,14 @@ ServiceWorkerRegistrationInfo::IsLastUpdateCheckTimeOverOneDay() const
   }
 
   const int64_t kSecondsPerDay = 86400;
-  const int64_t now =
+  const int64_t nowMicros =
     mCreationTime + static_cast<PRTime>((TimeStamp::Now() -
                                          mCreationTimeStamp).ToMicroseconds());
 
   // now < mLastUpdateTime if the system time is reset between storing
   // and loading mLastUpdateTime from ServiceWorkerRegistrar.
-  if (now < mLastUpdateTime ||
-      (now - mLastUpdateTime) / PR_MSEC_PER_SEC > kSecondsPerDay) {
+  if (nowMicros < mLastUpdateTime ||
+      (nowMicros - mLastUpdateTime) / PR_USEC_PER_SEC > kSecondsPerDay) {
     return true;
   }
   return false;