Add a signal to the scheduler that a navigation is expected

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 122918693a863641b39726789d7690050ba2440a..1965d23f4f69ce8c6aa935dff5e05dd65349200a 100644
--- a/third_party/WebKit/public/platform/WebScheduler.h
+++ b/third_party/WebKit/public/platform/WebScheduler.h
@@ -84,6 +84,12 @@ public:
     // if the suspension count is zero and the current scheduler policy allows it.
     virtual void resumeTimerQueue() { }
 
+    // Tells the scheduler that a navigation is expected.
+    virtual void onNavigationExpected() { }
+
+    // Tells the scheduler that an expected navigation was canceled.
+    virtual void onNavigationCanceled() { }
+
 #ifdef INSIDE_BLINK
     // Helpers for posting bound functions as tasks.
     typedef Function<void(double deadlineSeconds)> IdleTask;