Remove factory body in *.fromEnvironment, and implement this same behavior

pkg/compiler/lib/src/kernel/kernel_visitor.dart

Index: pkg/compiler/lib/src/kernel/kernel_visitor.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_visitor.dart b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
index 69fae3817eb167c8e5f225969367cfbfe1e37d20..543a705daea6628a82e7f237fd055d092efeae8c 100644
--- a/pkg/compiler/lib/src/kernel/kernel_visitor.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_visitor.dart
@@ -1240,7 +1240,7 @@ class KernelVisitor extends Object
   @override
   ir.InvocationExpression visitBoolFromEnvironmentConstructorInvoke(
       NewExpression node, BoolFromEnvironmentConstantExpression constant, _) {
-    return buildConstructorInvoke(node, isConst: true);
+    return associateNode(buildConstructorInvoke(node, isConst: true), node);
   }
 
   ir.TypeLiteral buildTypeLiteral(TypeConstantExpression constant) {
@@ -1737,7 +1737,7 @@ class KernelVisitor extends Object
   @override
   ir.InvocationExpression visitIntFromEnvironmentConstructorInvoke(
       NewExpression node, IntFromEnvironmentConstantExpression constant, _) {
-    return buildConstructorInvoke(node, isConst: true);
+    return associateNode(buildConstructorInvoke(node, isConst: true), node);
   }
 
   ir.IsExpression buildIs(Node expression, ResolutionDartType type) {
@@ -2352,7 +2352,7 @@ class KernelVisitor extends Object
   @override
   ir.InvocationExpression visitStringFromEnvironmentConstructorInvoke(
       NewExpression node, StringFromEnvironmentConstantExpression constant, _) {
-    return buildConstructorInvoke(node, isConst: true);
+    return associateNode(buildConstructorInvoke(node, isConst: true), node);
   }
 
   @override