Revert of Revert "cc: Make scheduler run incoming frame after previous deadline."

cc/scheduler/begin_frame_tracker.cc

 // 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.
 
 #include "cc/scheduler/begin_frame_tracker.h"
 
 namespace cc {
 
 BeginFrameTracker::BeginFrameTracker(const tracked_objects::Location& location)
     : location_(location),
@@ skipping 60 matching lines @@
   base::TimeDelta interval = current_args_.interval;
   // Normal interval will be ~16ms, 200Hz (5ms) screens are the fastest
   // easily available so anything less than that is likely an error.
   if (interval < base::TimeDelta::FromMilliseconds(1)) {
     interval = BeginFrameArgs::DefaultInterval();
   }
   return interval;
 }
 
 void BeginFrameTracker::AsValueInto(
-    base::TimeTicks now,
     base::trace_event::TracedValue* state) const {
   state->SetDouble("updated_at_ms",
                    (current_updated_at_ - base::TimeTicks()).InMillisecondsF());
   state->SetDouble(
       "finished_at_ms",
       (current_finished_at_ - base::TimeTicks()).InMillisecondsF());
   if (HasFinished()) {
     state->SetString("state", "FINISHED");
     state->BeginDictionary("current_args_");
   } else {
     state->SetString("state", "USING");
     state->BeginDictionary("last_args_");
   }
   current_args_.AsValueInto(state);
   state->EndDictionary();
 
+  base::TimeTicks now = base::TimeTicks::Now();
   base::TimeTicks frame_time = current_args_.frame_time;
   base::TimeTicks deadline = current_args_.deadline;
   base::TimeDelta interval = current_args_.interval;
   state->BeginDictionary("major_timestamps_in_ms");
   state->SetDouble("0_interval", interval.InMillisecondsF());
   state->SetDouble("1_now_to_deadline", (deadline - now).InMillisecondsF());
   state->SetDouble("2_frame_time_to_now", (now - frame_time).InMillisecondsF());
   state->SetDouble("3_frame_time_to_deadline",
                    (deadline - frame_time).InMillisecondsF());
   state->SetDouble("4_now", (now - base::TimeTicks()).InMillisecondsF());
   state->SetDouble("5_frame_time",
                    (frame_time - base::TimeTicks()).InMillisecondsF());
   state->SetDouble("6_deadline",
                    (deadline - base::TimeTicks()).InMillisecondsF());
   state->EndDictionary();
 }
 
 const BeginFrameArgs& BeginFrameTracker::DangerousMethodCurrentOrLast() const {
   if (!HasFinished()) {
     return Current();
   } else {
     return Last();
   }
 }
 
 }  // namespace cc