Cascade should have type set. Tests.

compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java

Index: compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java
diff --git a/compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java b/compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java
index e3779967c26f29a7c8c0a0d0db0c87001f042c7f..454b0b0ae32870614a8c720cf1ee3f8ac2834d8a 100644
--- a/compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java
+++ b/compiler/java/com/google/dart/compiler/type/TypeAnalyzer.java
@@ -32,6 +32,7 @@ import com.google.dart.compiler.ast.DartBinaryExpression;
 import com.google.dart.compiler.ast.DartBlock;
 import com.google.dart.compiler.ast.DartBooleanLiteral;
 import com.google.dart.compiler.ast.DartBreakStatement;
+import com.google.dart.compiler.ast.DartCascadeExpression;
 import com.google.dart.compiler.ast.DartCase;
 import com.google.dart.compiler.ast.DartCatchBlock;
 import com.google.dart.compiler.ast.DartClass;
@@ -1442,6 +1443,14 @@ public class TypeAnalyzer implements DartCompilationPhase {
     }
 
     @Override
+    public Type visitCascadeExpression(DartCascadeExpression node) {
+      DartExpression target = node.getTarget();
+      Type type = nonVoidTypeOf(target);
+      node.visitChildren(this);
+      return type;
+    }
+
+    @Override
     public Type visitFunctionObjectInvocation(DartFunctionObjectInvocation node) {
       ClassElement element = functionType.getElement();
       node.setElement(element);