Handle delayed tasks more natively in the scheduler

cc/test/test_now_source.h

Index: cc/test/test_now_source.h
diff --git a/cc/test/test_now_source.h b/cc/test/test_now_source.h
index 54e5a28494bf52c814d6dcab32f6bfa391d32346..9b46bbe70f1d42ef7be6a7bd3a30ca4093216056 100644
--- a/cc/test/test_now_source.h
+++ b/cc/test/test_now_source.h
@@ -37,6 +37,8 @@ class TestNowSource : public base::RefCounted<TestNowSource> {
   void AsValueInto(base::trace_event::TracedValue* state) const;
   std::string ToString() const;
 
+  int NumNowCalls() const { return num_now_calls_; }
+
  protected:
   TestNowSource();
   explicit TestNowSource(int64_t initial);
@@ -44,6 +46,7 @@ class TestNowSource : public base::RefCounted<TestNowSource> {
 
   base::TimeTicks initial_;
   base::TimeTicks now_;
+  mutable int num_now_calls_;
 
  private:
   friend class base::RefCounted<TestNowSource>;