Fix a batch of DDC SDK compile errors.

pkg/dev_compiler/tool/input_sdk/patch/core_patch.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Patch file for dart:core classes.
 import "dart:_internal" as _symbol_dev;
 import 'dart:_interceptors';
 import 'dart:_js_helper'
     show
         patch,
         checkInt,
         getRuntimeType,
+        getTraceFromException,
         jsonEncodeNative,
         JsLinkedHashMap,
         JSSyntaxRegExp,
+        NoInline,
+        objectHashCode,
         Primitives,
-        stringJoinUnchecked,
-        objectHashCode,
-        getTraceFromException;
+        stringJoinUnchecked;
 
 import 'dart:_foreign_helper' show JS;
 
 import 'dart:_native_typed_data' show NativeUint8List;
 
 String _symbolToString(Symbol symbol) => _symbol_dev.Symbol.getName(symbol);
 
 @patch
 int identityHashCode(Object object) => objectHashCode(object);
 
@@ skipping 94 matching lines @@
 
 @patch
 class int {
   @patch
   static int parse(String source, {int radix, int onError(String source)}) {
     return Primitives.parseInt(source, radix, onError);
   }
 
   @patch
   factory int.fromEnvironment(String name, {int defaultValue}) {
+    // ignore: const_constructor_throws_exception
     throw new UnsupportedError(
         'int.fromEnvironment can only be used as a const constructor');
   }
 }
 
 @patch
 class double {
   @patch
   static double parse(String source, [double onError(String source)]) {
     return Primitives.parseDouble(source, onError);
@@ skipping 240 matching lines @@
     return _stringFromIterable(charCodes, start, end);
   }
 
   @patch
   factory String.fromCharCode(int charCode) {
     return Primitives.stringFromCharCode(charCode);
   }
 
   @patch
   factory String.fromEnvironment(String name, {String defaultValue}) {
+    // ignore: const_constructor_throws_exception
     throw new UnsupportedError(
         'String.fromEnvironment can only be used as a const constructor');
   }
 
   static String _stringFromJSArray(
       /*=JSArray<int>*/ list,
       int start,
       int endOrNull) {
     int len = list.length;
     int end = RangeError.checkValidRange(start, endOrNull, len);
@@ skipping 34 matching lines @@
       }
     }
     return Primitives.stringFromCharCodes(list);
   }
 }
 
 @patch
 class bool {
   @patch
   factory bool.fromEnvironment(String name, {bool defaultValue: false}) {
+    // ignore: const_constructor_throws_exception
     throw new UnsupportedError(
         'bool.fromEnvironment can only be used as a const constructor');
   }
 
   @patch
   int get hashCode => super.hashCode;
 }
 
 @patch
 class RegExp {
@@ skipping 187 matching lines @@
 }
 
 @patch
 class StackTrace {
   @patch
   @NoInline()
   static StackTrace get current {
     return getTraceFromException(JS('', 'new Error()'));
   }
 }