Revert of Move throttling of background timers into the renderer scheduler

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

Index: third_party/WebKit/Source/core/frame/DOMTimerCoordinator.h
diff --git a/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.h b/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.h
index 2c7f0cde49748893c57b8cfcf7b951c4134e5a3c..69c8d222d9c0b6d3bff49734968babfa149a09db 100644
--- a/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.h
+++ b/third_party/WebKit/Source/core/frame/DOMTimerCoordinator.h
@@ -34,6 +34,11 @@
     // destroy the timer.
     void removeTimeoutByID(int id);
 
+    // Notifies registered timers that
+    // ExecutionContext::timerAlignmentInterval has changed so that
+    // timers can adjust their schedule to the new alignment interval.
+    void didChangeTimerAlignmentInterval();
+
     // Timers created during the execution of other timers, and
     // repeating timers, are throttled. Timer nesting level tracks the
     // number of linked timers or repetitions of a timer. See