Refactor computation of NativeBehavior.

pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart

Index: pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
diff --git a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
index e43efdfe44bea5399e9627cff5e5083aabd86f7e..ae0f6b90d2e6987e26cb5a797b43edc9b567335a 100644
--- a/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
+++ b/pkg/compiler/lib/src/ssa/kernel_ast_adapter.dart
@@ -588,30 +588,35 @@ class KernelAstAdapter extends KernelElementAdapterMixin {
     return cls.thisType;
   }
 
+  native.BehaviorBuilder get nativeBehaviorBuilder =>
+      new native.ResolverBehaviorBuilder(_compiler);
+
   /// Computes the native behavior for reading the native [field].
   // TODO(johnniwinther): Cache this for later use.
   native.NativeBehavior getNativeBehaviorForFieldLoad(ir.Field field) {
     ResolutionDartType type = getDartType(field.type);
     List<ConstantExpression> metadata = getMetadata(field.annotations);
-    return native.NativeBehavior.ofFieldLoad(CURRENT_ELEMENT_SPANNABLE, type,
-        metadata, typeLookup(resolveAsRaw: false), _compiler,
+    // TODO(johnniwinther): Provide the correct value for [isJsInterop].
+    return nativeBehaviorBuilder.buildFieldLoadBehavior(
+        type, metadata, typeLookup(resolveAsRaw: false),
         isJsInterop: false);
   }
 
   /// Computes the native behavior for writing to the native [field].
   // TODO(johnniwinther): Cache this for later use.
   native.NativeBehavior getNativeBehaviorForFieldStore(ir.Field field) {
-    ResolutionDartType type = getDartType(field.type);
-    return native.NativeBehavior.ofFieldStore(type, _compiler.resolution);
+    DartType type = getDartType(field.type);
+    return nativeBehaviorBuilder.buildFieldStoreBehavior(type);
   }
 
   /// Computes the native behavior for calling [procedure].
   // TODO(johnniwinther): Cache this for later use.
   native.NativeBehavior getNativeBehaviorForMethod(ir.Procedure procedure) {
-    ResolutionDartType type = getFunctionType(procedure.function);
+    DartType type = getFunctionType(procedure.function);
     List<ConstantExpression> metadata = getMetadata(procedure.annotations);
-    return native.NativeBehavior.ofMethod(CURRENT_ELEMENT_SPANNABLE, type,
-        metadata, typeLookup(resolveAsRaw: false), _compiler,
+    // TODO(johnniwinther): Provide the correct value for [isJsInterop].
+    return nativeBehaviorBuilder.buildMethodBehavior(
+        type, metadata, typeLookup(resolveAsRaw: false),
         isJsInterop: false);
   }