Partial backport of analyzer async/await fixes to Java.

editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/internal/resolver/TestTypeProvider.java

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/internal/resolver/TestTypeProvider.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/internal/resolver/TestTypeProvider.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/internal/resolver/TestTypeProvider.java
index 0ca09e14bf988272e677d71c8faff94c8b9fc6c0..1ba84892a827e7a58a04c3c0309bb6feb170f6cb 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/internal/resolver/TestTypeProvider.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/internal/resolver/TestTypeProvider.java
@@ -78,6 +78,11 @@ public class TestTypeProvider implements TypeProvider {
   private InterfaceType intType;
 
   /**
+   * The type representing 'Iterable<dynamic>'
+   */
+  private InterfaceType iterableDynamicType;
+
+  /**
    * The type representing the built-in type 'Iterable'.
    */
   private InterfaceType iterableType;
@@ -211,6 +216,15 @@ public class TestTypeProvider implements TypeProvider {
     return intType;
   }
 
+  @Override
+  public InterfaceType getIterableDynamicType() {
+    if (iterableDynamicType == null) {
+      iterableDynamicType = getIterableType().substitute(new Type[] {getDynamicType()});
+    }
+    return iterableDynamicType;
+  }
+
+  @Override
   public InterfaceType getIterableType() {
     if (iterableType == null) {
       ClassElementImpl iterableElement = classElement("Iterable", "E");