Incremental compilation of removed fields.

dart/tests/try/web/incremental_compilation_update_test.dart

Index: dart/tests/try/web/incremental_compilation_update_test.dart
diff --git a/dart/tests/try/web/incremental_compilation_update_test.dart b/dart/tests/try/web/incremental_compilation_update_test.dart
index 0c88155a63bf25d082f9af48b3e2ca7fc95d19f4..995708a9d1b6b69843b0a6ced0a1e00eb82b372a 100644
--- a/dart/tests/try/web/incremental_compilation_update_test.dart
+++ b/dart/tests/try/web/incremental_compilation_update_test.dart
@@ -996,6 +996,61 @@ main() {
 """,
             const <String>['v2']),
     ],
+
+    // Test removing a field from a class works.
+    // TODO(ahe): The emitter still see the field, and we need to ensure that
+    // old names aren't used again.
+    const <ProgramResult>[
+        const ProgramResult(
+            r"""
+class A {
+  var x;
+}
+
+var instance;
+
+main() {
+  if (instance == null) {
+    instance = new A();
+  }
+  try {
+    instance.x = 'v1';
+  } catch(e) {
+    print('setter threw');
+  }
+  try {
+    print(instance.x);
+  } catch (e) {
+    print('getter threw');
+  }
+}
+""",
+            const <String>['v1']),
+        const ProgramResult(
+            r"""
+class A {
+}
+
+var instance;
+
+main() {
+  if (instance == null) {
+    instance = new A();
+  }
+  try {
+    instance.x = 'v1';
+  } catch(e) {
+    print('setter threw');
+  }
+  try {
+    print(instance.x);
+  } catch (e) {
+    print('getter threw');
+  }
+}
+""",
+            const <String>['setter threw', 'getter threw']),
+    ],
 ];
 
 void main() {
@@ -1022,7 +1077,6 @@ Future compileAndRun(List<ProgramResult> programs) {
   return listener.expect('iframe-ready').then((_) {
     ProgramResult program = programs.first;
 
-
     status.append(
         new HeadingElement.h2()
             ..appendText("Full program #${testCount++}:"));