Use TimeDelta::operator/() more, base/ edition.

Bug: 1104532
Change-Id: Icd6a1b8331d30837f0b60937dd55f23d60d334fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2355009
Auto-Submit: Peter Kasting <pkasting@chromium.org>
Commit-Queue: François Doray <fdoray@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798121}

base/profiler/stack_sampling_profiler.cc

@@ -81,8 +81,7 @@ TimeTicks GetNextSampleTimeImpl(TimeTicks scheduled_current_sample_time,
   // The minimum number of sampling intervals required to get from the scheduled
   // current sample time to the earliest next sample time.
   const int64_t required_sampling_intervals = static_cast<int64_t>(
-      std::ceil(minimum_time_delta_to_next_sample.InMicrosecondsF() /
-                sampling_interval.InMicroseconds()));
+      std::ceil(minimum_time_delta_to_next_sample / sampling_interval));
   return scheduled_current_sample_time +
          required_sampling_intervals * sampling_interval;
 }

base/time/time_win.cc

@@ -309,7 +309,7 @@ double Time::GetHighResolutionTimerUsage() {
     // activation.
     used_time += now - g_high_res_timer_last_activation;
   }
-  return used_time.InMillisecondsF() / elapsed_time.InMillisecondsF() * 100;
+  return used_time / elapsed_time * 100;
 }
 
 // static