Issue 3268. Support for replacing 'assert' statement with 'assert' function

compiler/java/com/google/dart/compiler/DartCompiler.java

Index: compiler/java/com/google/dart/compiler/DartCompiler.java
diff --git a/compiler/java/com/google/dart/compiler/DartCompiler.java b/compiler/java/com/google/dart/compiler/DartCompiler.java
index 796d5f1c28d2fc183f788c2f3f6d301ee9b2252a..dd85e0b109ce94f4687c1b3210255d64f2e9e1f0 100644
--- a/compiler/java/com/google/dart/compiler/DartCompiler.java
+++ b/compiler/java/com/google/dart/compiler/DartCompiler.java
@@ -499,8 +499,7 @@ public class DartCompiler {
         }
 
         // The library scope can then be constructed, containing types declared
-        // in the library, and // types declared in the imports. Loop can be
-        // parallelized.
+        // in the library, and types declared in the imports. Loop can be parallelized.
         for (LibraryUnit lib : libs) {
           new TopLevelElementBuilder().fillInLibraryScope(lib, context);
         }
@@ -811,6 +810,11 @@ public class DartCompiler {
         } finally {
           Closeables.close(r, failed);
         }
+        
+        // auto-magically define "assert" function
+        if (dartSrc.getUri().toString().equals("dart://core/runtime/object.dart")) {
+          srcCode += "\nvoid assert(x) {}";
+        }
 
         DartScannerParserContext parserContext =
             new DartScannerParserContext(dartSrc, srcCode, context, context.getCompilerMetrics());