Partially revert 5aacee to see its impact on memory histograms.

Original CL: https://crrev.com/5aaceefd9a84327ce6afeaea16557449bf83ce57

BUG=chromium:515721
LOG=NO

Review URL: https://codereview.chromium.org/1264063003

Cr-Commit-Position: refs/heads/master@{#29968}

src/heap/heap.cc

@@ -4943,6 +4943,16 @@ void Heap::IdleNotificationEpilogue(GCIdleTimeAction action,
   isolate()->counters()->gc_idle_time_allotted_in_ms()->AddSample(
       static_cast<int>(idle_time_in_ms));
 
+  if (deadline_in_ms - start_ms >
+      GCIdleTimeHandler::kMaxFrameRenderingIdleTime) {
+    int committed_memory = static_cast<int>(CommittedMemory() / KB);
+    int used_memory = static_cast<int>(heap_state.size_of_objects / KB);
+    isolate()->counters()->aggregated_memory_heap_committed()->AddSample(
+        start_ms, committed_memory);
+    isolate()->counters()->aggregated_memory_heap_used()->AddSample(
+        start_ms, used_memory);
+  }
+
   if (deadline_difference >= 0) {
     if (action.type != DONE && action.type != DO_NOTHING) {
       isolate()->counters()->gc_idle_time_limit_undershot()->AddSample(