Removes flag --enable-new-md-input-view and add a opposite flag: --disable-new-md-input-view.

chrome/test/data/chromeos/virtual_keyboard/layout_test.js

Index: chrome/test/data/chromeos/virtual_keyboard/layout_test.js
diff --git a/chrome/test/data/chromeos/virtual_keyboard/layout_test.js b/chrome/test/data/chromeos/virtual_keyboard/layout_test.js
index 69a67c59600ff7aa556949a2a54c0410bcf0375b..7ab5fcb236cb754a19354a7d1c0058d562e7cc44 100644
--- a/chrome/test/data/chromeos/virtual_keyboard/layout_test.js
+++ b/chrome/test/data/chromeos/virtual_keyboard/layout_test.js
@@ -179,17 +179,15 @@ function testHandwritingLayoutAsync(testDoneCallback) {
       var hwtSelectBounds = hwtSelect.getBoundingClientRect();
       assertTrue(hwtSelectBounds.width > 0 && hwtSelectBounds.height > 0,
                  'Expect non-zero size for hwt select button.');
-      // TODO(fengyuan): bring back this handwriting test once found the cause.
-      /*onSwitchToKeyset('hwt', function() {
+      onSwitchToKeyset('hwt', function() {
         var view = getActiveView();
         assertEquals('hwt', view.id, 'Handwriting layout is not active.');
         var hwtCanvasView = view.querySelector('#canvasView');
         assertTrue(!!hwtCanvasView, 'Unable to find canvas view');
-        var candidateView = document.getElementById('candidateView');
-        assertTrue(!!candidateView, 'Unable to find candidate view');
-        var backButton = candidateView.querySelector(
-            '.inputview-candidate-button');
-        assertEquals('HANDWRITING_BACK', backButton.textContent);
+        var panelView = document.getElementById('panelView');
+        assertTrue(!!panelView, 'Unable to find panel view');
+        var backButton = panelView.querySelector('#backToKeyboard');
+        assertTrue(!!backButton, 'Unable to find back button.');
         onSwitchToKeyset('us.compact.qwerty', function() {
           assertEquals('us-compact-qwerty', getActiveView().id,
              'compact layout is not active.');
@@ -197,8 +195,7 @@ function testHandwritingLayoutAsync(testDoneCallback) {
         });
         mockTap(backButton);
       });
-      mockTap(hwtSelect);*/
-      testDoneCallback();
+      mockTap(hwtSelect);
     });
   };
   var config = {