Merge kernel closure conversion into the Dart SDK

pkg/kernel/testcases/closures/for_loop.dart.expect

+library;
+import self as self;
+import "dart:core" as core;
+import "dart:mock" as mock;
+
+class Closure#main#function extends core::Object implements core::Function {
+  field core::String note = "This is temporary. The VM doesn't need closure classes.";
+  field mock::Context context;
+  constructor •(final mock::Context context) → dynamic
+    : self::Closure#main#function::context = context
+    ;
+  method call() → dynamic {
+    "This is a temporary solution. In the VM, this will become an additional parameter.";
+    final mock::Context #contextParameter = this.{self::Closure#main#function::context};
+    return let final dynamic #t1 = #contextParameter.parent in let final dynamic #t2 = 0 in let final dynamic #t3 = #contextParameter.[](0) in let final dynamic #t4 = #t1.[]=(#t2, #t3) in #t3;
+  }
+}
+class Closure#main#function#1 extends core::Object implements core::Function {
+  field core::String note = "This is temporary. The VM doesn't need closure classes.";
+  field mock::Context context;
+  constructor •(final mock::Context context) → dynamic
+    : self::Closure#main#function#1::context = context
+    ;
+  method call() → dynamic {
+    "This is a temporary solution. In the VM, this will become an additional parameter.";
+    final mock::Context #contextParameter = this.{self::Closure#main#function#1::context};
+    if(!#contextParameter.parent.[](0).==(self::max.-(1)))
+      throw "last: ${#contextParameter.parent.[](0)} != ${self::max.-(1)}";
+  }
+}
+static const field core::int max = 100;
+static method main() → dynamic {
+  dynamic closures = <dynamic>[];
+  dynamic closures2 = <dynamic>[];
+  final mock::Context #context = new mock::Context::•(1);
+  #context.parent = null;
+  #context.[]=(0, null);
+  {
+    mock::Context #context = new mock::Context::•(1);
+    #context.parent = #context;
+    #context.[]=(0, 0);
+    for (; #context.[](0).<(self::max); #context = #context.copy(), #context.[]=(0, #context.[](0).+(1))) {
+      closures.add(new self::Closure#main#function::•(#context));
+      closures2.add(new self::Closure#main#function#1::•(#context));
+    }
+  }
+  core::int sum = 0;
+  for (core::Function f in closures) {
+    sum = sum.+(f.call());
+  }
+  for (core::Function f in closures2) {
+    f.call();
+  }
+  core::int expectedSum = self::max.-(1).*(self::max).~/(2);
+  if(!expectedSum.==(sum)) {
+    throw core::Exception::•("Unexpected sum = ${sum} != ${expectedSum}");
+  }
+}