Report UNRESOLVED_INSTANCE_MEMBER_REFERENCE for dynamicVar.member references.

pkg/analysis_server/lib/src/computer/computer_highlights2.dart

Index: pkg/analysis_server/lib/src/computer/computer_highlights2.dart
diff --git a/pkg/analysis_server/lib/src/computer/computer_highlights2.dart b/pkg/analysis_server/lib/src/computer/computer_highlights2.dart
index 1a8b5a6eef54478d986f3aaea1753db00dc37c58..c847670466c56701a752f7ba3ee76424c462e919 100644
--- a/pkg/analysis_server/lib/src/computer/computer_highlights2.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_highlights2.dart
@@ -96,6 +96,9 @@ class DartUnitHighlightsComputer2 {
     if (_addIdentifierRegion_typeParameter(node)) {
       return;
     }
+    if (_addIdentifierRegion_unresolvedInstanceMemberReference(node)) {
+      return;
+    }
     _addRegion_node(node, HighlightRegionType.IDENTIFIER_DEFAULT);
   }
 
@@ -352,6 +355,38 @@ class DartUnitHighlightsComputer2 {
     return _addRegion_node(node, HighlightRegionType.TYPE_PARAMETER);
   }
 
+  bool _addIdentifierRegion_unresolvedInstanceMemberReference(
+      SimpleIdentifier node) {
+    // unresolved
+    Element element = node.bestElement;
+    if (element != null) {
+      return false;
+    }
+    // invoke / get / set
+    bool decorate = false;
+    AstNode parent = node.parent;
+    if (parent is MethodInvocation) {
+      Expression target = parent.realTarget;
+      if (parent.methodName == node &&
+          target != null &&
+          _isDynamicExpression(target)) {
+        decorate = true;
+      }
+    } else if (node.inGetterContext() || node.inSetterContext()) {
+      if (parent is PrefixedIdentifier) {
+        decorate = parent.identifier == node;
+      } else if (parent is PropertyAccess) {
+        decorate = parent.propertyName == node;
+      }
+    }
+    if (decorate) {
+      _addRegion_node(
+          node, HighlightRegionType.UNRESOLVED_INSTANCE_MEMBER_REFERENCE);
+      return true;
+    }
+    return false;
+  }
+
   void _addRegion(int offset, int length, HighlightRegionType type) {
     _regions.add(new HighlightRegion(type, offset, length));
   }
@@ -384,6 +419,13 @@ class DartUnitHighlightsComputer2 {
     int end = b.end;
     _addRegion(offset, end - offset, type);
   }
+
+  static bool _isDynamicExpression(Expression e) {
+    if (e is SimpleIdentifier && e.staticElement is PrefixElement) {
+      return false;
+    }
+    return e.bestType.isDynamic;
+  }
 }
 
 /**