Handle index expressions in the middle of call chains.

test/regression/other/analysis_server.unit

 >>> (indent 2)
   main() {
     List<Future<List<LocationImpl>>> nodeFutures =
         <Future<List<LocationImpl>>>[];
   }
 <<<
   main() {
     List<Future<List<LocationImpl>>> nodeFutures =
         <Future<List<LocationImpl>>>[];
   }
@@ skipping 228 matching lines @@
             // TODO(johnniwinther): Support closure variables.
             new Set<dart2js.Local>()), () {
       irBuilder.buildFunctionHeader(
           constructor.parameters.map(converter.convertElement));
       // Visit the body directly to avoid processing the signature as
       // expressions.
       // Call to allow for `body == null` in case of synthesized constructors.
       build(body);
       return irBuilder.makeConstructorDefinition(const [], const []);
     });
-  }
+  }
+>>> (indent 4)
+    Element expectedElement = (declarations[0] as TopLevelVariableDeclaration)
+            .variables
+            .variables[0]
+        .name
+        .staticElement;
+<<<
+    Element expectedElement = (declarations[0] as TopLevelVariableDeclaration)
+        .variables
+        .variables[0]
+        .name
+        .staticElement;