Fix bugs supporting configuring DDC runtime settings before the application starts.

pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/profile.dart

Index: pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/profile.dart
diff --git a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/profile.dart b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/profile.dart
index 082410011cab21b1bb37359bb845edbc5cebb033..d10ead7355d490d2849777bef539f2d134e68e89 100644
--- a/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/profile.dart
+++ b/pkg/dev_compiler/tool/input_sdk/private/ddc_runtime/profile.dart
@@ -72,6 +72,7 @@ List<List<Object>> getDynamicStats() {
         if (!mappedFrame.contains('dart:_runtime/operations.dart') &&
             !mappedFrame.contains('dart:_runtime/profile.dart')) {
           src = mappedFrame;
+
           break;
         }
       }
@@ -114,14 +115,16 @@ clearDynamicStats() {
   _callMethodRecords.clear();
 }
 
-bool _trackProfile = false;
+// We need to set this property while the sdk is only partially initialized
+// so we cannot use a regular Dart field.
+bool get _trackProfile => JS('bool', 'dart.__trackProfile');
 
 void trackProfile(bool flag) {
-  _trackProfile = flag;
+  JS('', 'dart.__trackProfile = #', flag);
 }
 
 _trackCall(obj) {
-  if (JS('bool', '!#', trackProfile)) return;
+  if (JS('bool', '!#', _trackProfile)) return;
   int index = -1;
   _totalCallRecords++;
   if (_callMethodRecords.length == _callRecordSampleSize) {