[vm-service] Encode ticks directly as integers, since they are expect to stay in JS integer range.

runtime/vm/profiler_service.cc

Index: runtime/vm/profiler_service.cc
diff --git a/runtime/vm/profiler_service.cc b/runtime/vm/profiler_service.cc
index 3f8d50758cec5f5129141e08e5581d22593617f8..3b8a8cd05a036356a07e8be1691edfbaa0ffa329 100644
--- a/runtime/vm/profiler_service.cc
+++ b/runtime/vm/profiler_service.cc
@@ -229,8 +229,8 @@ void ProfileFunction::PrintToJSONObject(JSONObject* func) {
 void ProfileFunction::PrintToJSONArray(JSONArray* functions) {
   JSONObject obj(functions);
   obj.AddProperty("kind", KindToCString(kind()));
-  obj.AddPropertyF("inclusiveTicks", "%" Pd "", inclusive_ticks());
-  obj.AddPropertyF("exclusiveTicks", "%" Pd "", exclusive_ticks());
+  obj.AddProperty("inclusiveTicks", inclusive_ticks());
+  obj.AddProperty("exclusiveTicks", exclusive_ticks());
   if (kind() == kDartFunction) {
     ASSERT(!function_.IsNull());
     obj.AddProperty("function", function_);
@@ -507,8 +507,8 @@ const char* ProfileCode::KindToCString(Kind kind) {
 void ProfileCode::PrintToJSONArray(JSONArray* codes) {
   JSONObject obj(codes);
   obj.AddProperty("kind", ProfileCode::KindToCString(kind()));
-  obj.AddPropertyF("inclusiveTicks", "%" Pd "", inclusive_ticks());
-  obj.AddPropertyF("exclusiveTicks", "%" Pd "", exclusive_ticks());
+  obj.AddProperty("inclusiveTicks", inclusive_ticks());
+  obj.AddProperty("exclusiveTicks", exclusive_ticks());
   if (kind() == kDartCode) {
     ASSERT(!code_.IsNull());
     obj.AddProperty("code", code_);
@@ -527,8 +527,8 @@ void ProfileCode::PrintToJSONArray(JSONArray* codes) {
     for (intptr_t i = 0; i < address_ticks_.length(); i++) {
       const ProfileCodeAddress& entry = address_ticks_[i];
       ticks.AddValueF("%" Px "", entry.pc());
-      ticks.AddValueF("%" Pd "", entry.exclusive_ticks());
-      ticks.AddValueF("%" Pd "", entry.inclusive_ticks());
+      ticks.AddValue(entry.exclusive_ticks());
+      ticks.AddValue(entry.inclusive_ticks());
     }
   }
 }