Optimize StackTrace.current Eliminate redundant call to captureStackTrace and compute the stack tra…

sdk/lib/_internal/js_runtime/lib/core_patch.dart

Index: sdk/lib/_internal/js_runtime/lib/core_patch.dart
diff --git a/sdk/lib/_internal/js_runtime/lib/core_patch.dart b/sdk/lib/_internal/js_runtime/lib/core_patch.dart
index af96764c5665553988c70778e3e1b16191570c6b..e5e76bfa6478fc459621dd449463ed15e6fbaab9 100644
--- a/sdk/lib/_internal/js_runtime/lib/core_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/core_patch.dart
@@ -687,17 +687,18 @@ Uri _resolvePackageUri(Uri packageUri) {
   return resolved;
 }
 
+bool _hasErrorStackProperty = JS('bool', 'new Error().stack != void 0');
+
 @patch
 class StackTrace {
   @patch
   @NoInline()
   static StackTrace get current {
-    if (JS('', 'Error.captureStackTrace') != null) {
-      var error = JS('', 'new Error()');
-      JS('void', 'Error.captureStackTrace(#)', error);
-      return getTraceFromException(error);
+    if (_hasErrorStackProperty) {
+      return getTraceFromException(JS('', 'new Error()'));
     }
-    // Fallback if Error.captureStackTrace does not exist.
+    // Fallback if new Error().stack does not exist.
+    // Currently only required for IE 11.
     try {
       throw '';
     } catch (_, stackTrace) {