Compute and cache element NativeBehavior during resolution.

pkg/compiler/lib/src/resolution/resolution.dart

Index: pkg/compiler/lib/src/resolution/resolution.dart
diff --git a/pkg/compiler/lib/src/resolution/resolution.dart b/pkg/compiler/lib/src/resolution/resolution.dart
index 9317d30f9fca0a1e7497ad8d9b871056f31ea2be..f1ca6d02630b1314b5480dbdf9430ed0556a8a0b 100644
--- a/pkg/compiler/lib/src/resolution/resolution.dart
+++ b/pkg/compiler/lib/src/resolution/resolution.dart
@@ -285,6 +285,8 @@ class ResolverTask extends CompilerTask {
         reporter.reportErrorMessage(tree, MessageKind.NO_SUCH_METHOD_IN_NATIVE);
       }
 
+      resolution.target.resolveNativeElement(element, registry.worldImpact);
+
       return registry.worldImpact;
     });
   }
@@ -414,6 +416,8 @@ class ResolverTask extends CompilerTask {
     // Perform various checks as side effect of "computing" the type.
     element.computeType(resolution);
 
+    resolution.target.resolveNativeElement(element, registry.worldImpact);
+
     return registry.worldImpact;
   }