Revert of Move throttling of background timers into the renderer scheduler

third_party/WebKit/public/platform/WebScheduler.h

Index: third_party/WebKit/public/platform/WebScheduler.h
diff --git a/third_party/WebKit/public/platform/WebScheduler.h b/third_party/WebKit/public/platform/WebScheduler.h
index aeeb8f42089304e274e846087e5c37fad9bfdb4f..0af83a2dbe8383b30f2491d92293d09204ae26cf 100644
--- a/third_party/WebKit/public/platform/WebScheduler.h
+++ b/third_party/WebKit/public/platform/WebScheduler.h
@@ -60,6 +60,15 @@
     // Takes ownership of |IdleTask|. Can be called from any thread.
     virtual void postIdleTaskAfterWakeup(const WebTraceLocation&, WebThread::IdleTask*) = 0;
 
+    // Schedule a timer task to be run on the the associated WebThread. Timer Tasks
+    // tasks usually have the default priority, but may be delayed
+    // when the user is interacting with the device.
+    // |monotonicTime| is in the timebase of WTF::monotonicallyIncreasingTime().
+    // Takes ownership of |WebTaskRunner::Task|. Can be called from any thread.
+    // TODO(alexclarke): Move timer throttling for background pages to the
+    // chromium side and remove this.
+    virtual void postTimerTaskAt(const WebTraceLocation&, WebTaskRunner::Task*, double monotonicTime) = 0;
+
     // Returns a WebTaskRunner for loading tasks. Can be called from any thread.
     virtual WebTaskRunner* loadingTaskRunner() = 0;