Visual refresh of allocation profile page

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
diff --git a/runtime/vm/isolate.h b/runtime/vm/isolate.h
index 17d9164a5aa1e87cf2fca6b37645c7db38a1e473..7770f1193874d3379bf4bc0a9164c7d2552cb0dd 100644
--- a/runtime/vm/isolate.h
+++ b/runtime/vm/isolate.h
@@ -465,6 +465,23 @@ class Isolate : public BaseIsolate {
     deopt_context_ = value;
   }
 
+  void UpdateLastAllocationProfileAccumulatorResetTimestamp() {
+    last_allocationprofile_accumulator_reset_timestamp_ =
+        OS::GetCurrentTimeMillis();
+  }
+
+  int64_t last_allocationprofile_accumulator_reset_timestamp() const {
+    return last_allocationprofile_accumulator_reset_timestamp_;
+  }
+
+  void UpdateLastAllocationProfileGCTimestamp() {
+    last_allocationprofile_gc_timestamp_ = OS::GetCurrentTimeMillis();
+  }
+
+  int64_t last_allocationprofile_gc_timestamp() const {
+    return last_allocationprofile_gc_timestamp_;
+  }
+
   intptr_t BlockClassFinalization() {
     ASSERT(defer_finalization_count_ >= 0);
     return defer_finalization_count_++;
@@ -607,6 +624,10 @@ class Isolate : public BaseIsolate {
   char* stacktrace_;
   intptr_t stack_frame_index_;
 
+  // Timestamps of last operation via service.
+  int64_t last_allocationprofile_accumulator_reset_timestamp_;
+  int64_t last_allocationprofile_gc_timestamp_;
+
   bool cha_used_;
 
   // Ring buffer of objects assigned an id.