Handle constructor declarations.

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

Index: pkg/compiler/lib/src/resolution/members.dart
diff --git a/pkg/compiler/lib/src/resolution/members.dart b/pkg/compiler/lib/src/resolution/members.dart
index a3c33ba4c1d9319bcc44ca233d53930cee21afec..838224db374c6dd84f8139f42e49caa4da6f4e2c 100644
--- a/pkg/compiler/lib/src/resolution/members.dart
+++ b/pkg/compiler/lib/src/resolution/members.dart
@@ -3445,12 +3445,13 @@ class ResolverVisitor extends MappingVisitor<ResolutionResult> {
         registry.setSelector(node, setterSelector);
         registry.setOperatorSelectorInComplexSendSet(node, operatorSelector);
 
-        registry.registerDynamicUse(new DynamicUse(operatorSelector, null));
-
         SendStructure sendStructure;
         if (operator.kind == AssignmentOperatorKind.IF_NULL) {
+          registry.registerConstantLiteral(new NullConstantExpression());
+          registry.registerDynamicUse(new DynamicUse(Selectors.equals, null));
           sendStructure = new SetIfNullStructure(semantics);
         } else {
+          registry.registerDynamicUse(new DynamicUse(operatorSelector, null));
           sendStructure = new CompoundStructure(semantics, operator);
         }
         registry.registerSendStructure(node, sendStructure);
@@ -3888,11 +3889,10 @@ class ResolverVisitor extends MappingVisitor<ResolutionResult> {
       // and only declaration elements may be registered.
       // TODO(johniwinther): Avoid registration of `type` in face of redirecting
       // factory constructors.
-      registry.registerStaticUse(
-          node.isConst
-              ? new StaticUse.constConstructorInvoke(
+      registry.registerStaticUse(node.isConst
+          ? new StaticUse.constConstructorInvoke(
               constructor.declaration, callStructure, type)
-              : new StaticUse.typedConstructorInvoke(
+          : new StaticUse.typedConstructorInvoke(
               constructor.declaration, callStructure, type));
       InterfaceType interfaceType = type;
       if (interfaceType.typeArguments.any((DartType type) => !type.isDynamic)) {