Dart: Removes name conflicts from generated bindings.

sky/tests/resources/event-sender.dart

Index: sky/tests/resources/event-sender.dart
diff --git a/sky/tests/resources/event-sender.dart b/sky/tests/resources/event-sender.dart
index e4dcdacf845de318d4a1f3ef062b984896b5f8da..bb4121c93f285ddefdf9dfab4445177d3ff5368a 100644
--- a/sky/tests/resources/event-sender.dart
+++ b/sky/tests/resources/event-sender.dart
@@ -66,12 +66,13 @@ harness.TestHarnessProxy _init() {
   return harnessProxy;
 }
 
-final harness.TestHarnessProxy _harness = _init();
+final harness.TestHarnessProxy _harnessProxy = _init();
 
 // |0| should be EventFlags_NONE once its a compile-time constant.
 void keyDown(int keyCode, [int eventFlags = 0]) {
+  var harness = _harnessProxy.interface;
   if (!_chars.contains(keyCode)) {
-    _harness.dispatchInputEvent(
+    harness.dispatchInputEvent(
         new events.Event()
         ..action = constants.EventType_KEY_PRESSED
         ..flags = eventFlags
@@ -79,7 +80,7 @@ void keyDown(int keyCode, [int eventFlags = 0]) {
                      ..keyCode = keyCode
                      ..windowsKeyCode = keyCode));
 
-    _harness.dispatchInputEvent(
+    harness.dispatchInputEvent(
         new events.Event()
         ..action = constants.EventType_KEY_PRESSED
         ..flags = eventFlags
@@ -88,8 +89,8 @@ void keyDown(int keyCode, [int eventFlags = 0]) {
                      ..windowsKeyCode = keyCode));
   } else {
     ++_keyPressesRemaining;
-    _harness.dispatchInputEvent(
-        new events.Event()
+    harness.dispatchInputEvent(
+       new events.Event()
         ..action = constants.EventType_KEY_PRESSED
         ..flags = eventFlags
         ..keyData = (new events.KeyData()