Revert of Move throttling of background timers into the renderer scheduler

third_party/WebKit/public/platform/WebScheduler.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebScheduler_h
 #define WebScheduler_h
 
 #include "WebCommon.h"
 #include "public/platform/WebPassOwnPtr.h"
 #include "public/platform/WebTaskRunner.h"
@@ skipping 42 matching lines @@
     // make it run later than it normally would, but it won't make it
     // run earlier than it normally would.
     virtual void postNonNestableIdleTask(const WebTraceLocation&, WebThread::IdleTask*) = 0;
 
     // Like postIdleTask but does not run the idle task until after some other
     // task has run. This enables posting of a task which won't stop the Blink
     // main thread from sleeping, but will start running after it wakes up.
     // 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;
 
     // Returns a WebTaskRunner for timer tasks. Can be called from any thread.
     virtual WebTaskRunner* timerTaskRunner() = 0;
 
     // Creates a new WebViewScheduler for a given WebView. Must be called from
     // the associated WebThread.
     virtual WebPassOwnPtr<WebViewScheduler> createWebViewScheduler(blink::WebView*) = 0;
 
@@ skipping 21 matching lines @@
 
     void postIdleTask(const WebTraceLocation&, PassOwnPtr<IdleTask>);
     void postNonNestableIdleTask(const WebTraceLocation&, PassOwnPtr<IdleTask>);
     void postIdleTaskAfterWakeup(const WebTraceLocation&, PassOwnPtr<IdleTask>);
 #endif
 };
 
 } // namespace blink
 
 #endif // WebScheduler_h