re-land fix #27110 with proper DDC side of changes

pkg/dev_compiler/lib/js/es6/dart_sdk.js

Index: pkg/dev_compiler/lib/js/es6/dart_sdk.js
diff --git a/pkg/dev_compiler/lib/js/es6/dart_sdk.js b/pkg/dev_compiler/lib/js/es6/dart_sdk.js
index 513022c708e29ba1e8c867b4c4708424549049f1..79335090e7a63bc5a99d81910d1436acecc3b73f 100644
--- a/pkg/dev_compiler/lib/js/es6/dart_sdk.js
+++ b/pkg/dev_compiler/lib/js/es6/dart_sdk.js
@@ -25576,7 +25576,7 @@ collection._iterablePartsToStrings = function(iterable, parts) {
         count++;
         if (count > MAX_COUNT) {
           while (dart.notNull(length) > LENGTH_LIMIT - ELLIPSIS_SIZE - OVERHEAD && count > HEAD_COUNT) {
-            length = dart.notNull(length) - dart.notNull(core.int._check(dart.dsend(dart.dload(parts[dartx.removeLast](), 'length'), '+', OVERHEAD)));
+            length = dart.notNull(length) - dart.notNull(core.num._check(dart.dsend(dart.dload(parts[dartx.removeLast](), 'length'), '+', OVERHEAD)));
             count--;
           }
           parts[dartx.add]("...");
@@ -25594,7 +25594,7 @@ collection._iterablePartsToStrings = function(iterable, parts) {
     length = dart.notNull(length) + (ELLIPSIS_SIZE + OVERHEAD);
   }
   while (dart.notNull(length) > LENGTH_LIMIT && dart.notNull(parts[dartx.length]) > HEAD_COUNT) {
-    length = dart.notNull(length) - dart.notNull(core.int._check(dart.dsend(dart.dload(parts[dartx.removeLast](), 'length'), '+', OVERHEAD)));
+    length = dart.notNull(length) - dart.notNull(core.num._check(dart.dsend(dart.dload(parts[dartx.removeLast](), 'length'), '+', OVERHEAD)));
     if (elision == null) {
       elision = "...";
       length = dart.notNull(length) + (ELLIPSIS_SIZE + OVERHEAD);
@@ -78396,13 +78396,13 @@ html.CssRect = class CssRect extends core.Object {
     let val = 0;
     for (let measurement of dimensions) {
       if (augmentingMeasurement == html._MARGIN) {
-        val = dart.notNull(val) + dart.notNull(dart.asInt(new html.Dimension.css(styles[dartx.getPropertyValue](dart.str`${augmentingMeasurement}-${measurement}`)).value));
+        val = dart.notNull(val) + dart.notNull(new html.Dimension.css(styles[dartx.getPropertyValue](dart.str`${augmentingMeasurement}-${measurement}`)).value);
       }
       if (augmentingMeasurement == html._CONTENT) {
-        val = dart.notNull(val) - dart.notNull(dart.asInt(new html.Dimension.css(styles[dartx.getPropertyValue](dart.str`${html._PADDING}-${measurement}`)).value));
+        val = dart.notNull(val) - dart.notNull(new html.Dimension.css(styles[dartx.getPropertyValue](dart.str`${html._PADDING}-${measurement}`)).value);
       }
       if (augmentingMeasurement != html._MARGIN) {
-        val = dart.notNull(val) - dart.notNull(dart.asInt(new html.Dimension.css(styles[dartx.getPropertyValue](dart.str`border-${measurement}-width`)).value));
+        val = dart.notNull(val) - dart.notNull(new html.Dimension.css(styles[dartx.getPropertyValue](dart.str`border-${measurement}-width`)).value);
       }
     }
     return val;