Made assert a keyword.

lib/compiler/implementation/compiler.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.
 
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
 const bool REPORT_EXCESS_RESOLUTION = false;
@@ skipping 372 matching lines @@
     // The core and coreimpl libraries were loaded and patched before
     // jsHelperLibrary was initialized, so it wasn't imported into those
     // two libraries during patching.
     importHelperLibrary(coreLibrary);
     importHelperLibrary(coreImplLibrary);
     importHelperLibrary(interceptorsLibrary);
 
     addForeignFunctions(jsHelperLibrary);
     addForeignFunctions(interceptorsLibrary);
 
-    assertMethod = jsHelperLibrary.find(const SourceString('assert'));
+    assertMethod = jsHelperLibrary.find(const SourceString('assertHelper'));
     identicalFunction = coreLibrary.find(const SourceString('identical'));
 
     initializeSpecialClasses();
 
     functionClass.ensureResolved(this);
     functionApplyMethod =
         functionClass.lookupLocalMember(const SourceString('apply'));
   }
 
   void loadCoreImplLibrary() {
@@ skipping 444 matching lines @@
   // TODO(johnniwinther): Use [spannable] and [message] to provide better
   // information on assertion errors.
   if (condition is Function){
     condition = condition();
   }
   if (!condition && message != null) {
     print('assertion failed: $message');
   }
   return spannable != null && condition;
 }