Revert of Move throttling of background timers into the renderer scheduler

third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp

Index: third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp
diff --git a/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp b/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp
index 4401db92bd20fae0217377162b880c4e627fd185..240f8cb5d0d7c6abb041666c257b9f14056fb1e5 100644
--- a/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp
+++ b/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.cpp
@@ -42,6 +42,20 @@
     m_timers.remove(timeoutID);
 }
 
+void DOMTimerCoordinator::didChangeTimerAlignmentInterval()
+{
+    // Reschedule timers in increasing order of desired run time to maintain their relative order.
+    // TODO(skyostil): Move timer alignment into the scheduler.
+    WillBeHeapVector<RawPtrWillBeMember<DOMTimer>> timers;
+    timers.reserveCapacity(m_timers.size());
+    for (TimeoutMap::iterator iter = m_timers.begin(); iter != m_timers.end(); ++iter)
+        timers.append(iter->value.get());
+    std::sort(timers.begin(), timers.end(), TimerBase::Comparator());
+    double now = monotonicallyIncreasingTime();
+    for (DOMTimer* timer : timers)
+        timer->didChangeAlignmentInterval(now);
+}
+
 DEFINE_TRACE(DOMTimerCoordinator)
 {
 #if ENABLE(OILPAN)