Use Map.addAll() where possible in the resolver.

pkg/analyzer/lib/src/generated/resolver.dart

Index: pkg/analyzer/lib/src/generated/resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/resolver.dart b/pkg/analyzer/lib/src/generated/resolver.dart
index 315253b35ecb08df414b4369412dd3683888295b..a98b97f8190a97ed950a16f5c47525be612d36d6 100644
--- a/pkg/analyzer/lib/src/generated/resolver.dart
+++ b/pkg/analyzer/lib/src/generated/resolver.dart
@@ -9361,9 +9361,7 @@ class NamespaceBuilder {
    */
   void _addAllFromMap(

[Brian Wilkerson, 2015/03/12 18:59:44]

Shouldn't we just get rid of this helper method?

       Map<String, Element> definedNames, Map<String, Element> newNames) {
-    newNames.forEach((String name, Element element) {
-      definedNames[name] = element;
-    });
+    definedNames.addAll(newNames);
   }
 
   /**
@@ -9375,7 +9373,7 @@ class NamespaceBuilder {
   void _addAllFromNamespace(
       Map<String, Element> definedNames, Namespace namespace) {
     if (namespace != null) {
-      _addAllFromMap(definedNames, namespace.definedNames);
+      definedNames.addAll(namespace.definedNames);
     }
   }
 
@@ -12899,9 +12897,7 @@ class TypeOverrideManager_TypeOverrideScope {
    * @param overrides the overrides to be applied
    */
   void applyOverrides(Map<VariableElement, DartType> overrides) {
-    overrides.forEach((VariableElement element, DartType type) {
-      _overridenTypes[element] = type;
-    });
+    _overridenTypes.addAll(overrides);
   }
 
   /**