Add additional hints to the analyzer to catch the 'x is double' dart2js bug.

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

Index: editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/HintCodeTest.java
diff --git a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/HintCodeTest.java b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/HintCodeTest.java
index ebb3ac129c7f1042c32487775de2ebd16fc6e378..c207ccbe13129db5bb900177957606e0a31b9338 100644
--- a/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/HintCodeTest.java
+++ b/editor/tools/plugins/com.google.dart.engine_test/src/com/google/dart/engine/resolver/HintCodeTest.java
@@ -297,6 +297,38 @@ public class HintCodeTest extends ResolverTestCase {
     verify(source);
   }
 
+  public void test_isDouble() throws Exception {
+    Source source = addSource(createSource(//
+    "var v = 1 is double;"));
+    resolve(source);
+    assertErrors(source, HintCode.IS_DOUBLE);
+    verify(source);
+  }
+
+  public void test_isInt() throws Exception {
+    Source source = addSource(createSource(//
+    "var v = 1 is int;"));
+    resolve(source);
+    assertErrors(source, HintCode.IS_INT);
+    verify(source);
+  }
+
+  public void test_isNotDouble() throws Exception {
+    Source source = addSource(createSource(//
+    "var v = 1 is! double;"));
+    resolve(source);
+    assertErrors(source, HintCode.IS_NOT_DOUBLE);
+    verify(source);
+  }
+
+  public void test_isNotInt() throws Exception {
+    Source source = addSource(createSource(//
+    "var v = 1 is! int;"));
+    resolve(source);
+    assertErrors(source, HintCode.IS_NOT_INT);
+    verify(source);
+  }
+
   public void test_unusedImport() throws Exception {
     Source source = addSource(createSource(//
         "library L;",