Add --analyze-only flag to dart2js

sdk/lib/_internal/compiler/implementation/resolution/members.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of resolution;
 
 abstract class TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   DartType getType(Node node);
@@ skipping 350 matching lines @@
   }
 
   TreeElements resolveField(VariableElement element) {
     Node tree = element.parseNode(compiler);
     if(element.modifiers.isStatic() && element.variables.isTopLevel()) {
       error(element.modifiers.getStatic(),
             MessageKind.TOP_LEVEL_VARIABLE_DECLARED_STATIC);
     }
     ResolverVisitor visitor = visitorFor(element);
     initializerDo(tree, visitor.visit);
+
+    // Perform various checks as side effect of "computing" the type.
+    element.computeType(compiler);
+
     return visitor.mapping;
   }
 
   TreeElements resolveParameter(Element element) {
     Node tree = element.parseNode(compiler);
     ResolverVisitor visitor = visitorFor(element.enclosingElement);
     initializerDo(tree, visitor.visit);
     return visitor.mapping;
   }
 
@@ skipping 3214 matching lines @@
     return e;
   }
 
   /// Assumed to be called by [resolveRedirectingFactory].
   Element visitReturn(Return node) {
     Node expression = node.expression;
     return finishConstructorReference(visit(expression),
                                       expression, expression);
   }
 }