Change assert implementation to not depend on a top-level function called 'assert'.

lib/compiler/implementation/universe.dart

Index: lib/compiler/implementation/universe.dart
diff --git a/lib/compiler/implementation/universe.dart b/lib/compiler/implementation/universe.dart
index cbe0b532a173254114c9a289b38fb4bebad67bfe..1428ae1f272acd93444ab0bcf84a64687e598016 100644
--- a/lib/compiler/implementation/universe.dart
+++ b/lib/compiler/implementation/universe.dart
@@ -163,6 +163,14 @@ class Selector implements Hashable {
   bool isUnaryOperator() => isOperator() && argumentCount == 0;
   bool isBinaryOperator() => isOperator() && argumentCount == 1;
 
+  /** Check whether this is a call to 'assert' with one positional parameter. */
+  bool isAssertSyntax() {
+    return (isCall() &&
+            name == const SourceString("assert") &&

[ahe, 2012/09/06 22:25:53]

name.stringValue === 'assert'

[Lasse Reichstein Nielsen, 2012/09/07 10:18:57]

Done.

+            argumentCount == 1 &&
+            namedArgumentCount == 0);
+  }
+
   int hashCode() => argumentCount + 1000 * namedArguments.length;
   int get namedArgumentCount => namedArguments.length;
   int get positionalArgumentCount => argumentCount - namedArgumentCount;
@@ -297,8 +305,9 @@ class Selector implements Hashable {
 
   bool operator ==(other) {
     if (other is !Selector) return false;
-    return receiverType === other.receiverType
-        && equalsUntyped(other);
+    Selector otherSelector = other;

[ahe, 2012/09/06 22:25:53]

This change is unnecessary and doesn't improve readability of the code.

[Lasse Reichstein Nielsen, 2012/09/07 10:18:57]

Done.

+    return receiverType === otherSelector.receiverType
+        && equalsUntyped(otherSelector);
   }
 
   bool equalsUntyped(Selector other) {