Hide the insertion handle when performing a Cut

Make behavior uniform with other apps on Android,
where after a Cut from an editable field, the 
insertion handle is hidden and only the cursor
remains visible.
https://codereview.chromium.org/394953005/

BUG:394781

Review URL: https://codereview.chromium.org/399613008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284138 0039d316-1c4b-4281-b951-d872f2087c98

AUTHORS

@@ -357,6 +357,7 @@ Sanjoy Pal <sanjoy.pal@samsung.com>
 Sanne Wouda <sanne.wouda@gmail.com>
 Sathish Kuppuswamy <sathish.kuppuswamy@intel.com>
 Satoshi Matsuzaki <satoshi.matsuzaki@gmail.com>
+Sayan Nayak <sayan.nayak@samsung.com>
 Scott Blomquist <sblom@microsoft.com>
 Sean Bryant <sean@cyberwang.net>
 Seo Sanghyeon <sanxiyn@gmail.com>

content/public/android/java/src/org/chromium/content/browser/SelectActionModeCallback.java

@@ -150,6 +150,7 @@ public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
             mActionHandler.selectAll();
         } else if (id == R.id.select_action_menu_cut) {
             mActionHandler.cut();
+            mode.finish();
         } else if (id == R.id.select_action_menu_copy) {
             mActionHandler.copy();
             mode.finish();