Revert of Domain Reliability: Switch to BackoffEntry in Scheduler

components/domain_reliability/util.cc

Index: components/domain_reliability/util.cc
diff --git a/components/domain_reliability/util.cc b/components/domain_reliability/util.cc
index 6fc50c56e42e4d254fa40998423d14d788482286..68f6db6dad6afeb23b5867b0e98b99d5f670545f 100644
--- a/components/domain_reliability/util.cc
+++ b/components/domain_reliability/util.cc
@@ -136,17 +136,4 @@
   return scoped_ptr<MockableTime::Timer>(new ActualTimer());
 }
 
-MockableTimeBackoffEntry::MockableTimeBackoffEntry(
-    const net::BackoffEntry::Policy* const policy,
-    MockableTime* time)
-    : net::BackoffEntry(policy),
-      time_(time) {
-}
-
-MockableTimeBackoffEntry::~MockableTimeBackoffEntry() {}
-
-base::TimeTicks MockableTimeBackoffEntry::ImplGetTimeNow() const {
-  return time_->NowTicks();
-}
-
 }  // namespace domain_reliability