Add Windows commandline switch --enable-views-textfield.

ui/views/events/event.cc

Index: ui/views/events/event.cc
diff --git a/ui/views/events/event.cc b/ui/views/events/event.cc
index fa8ce364a55d3284f540eff7db373962962f20c6..a1a31554f3e1457adbf9a0fa84635cd1eca1c74c 100644
--- a/ui/views/events/event.cc
+++ b/ui/views/events/event.cc
@@ -87,6 +87,22 @@ KeyEvent::KeyEvent(ui::EventType type,
       unmodified_character_(0) {
 }
 
+bool KeyEvent::IsNumPadDigit() const {
+  if (key_code_ >= VK_NUMPAD0 && key_code_ <= VK_NUMPAD9)
+    return true;
+
+  // Check for num pad keys without NumLock.
+  // Note: there is no easy way to know if a the key that was pressed comes from
+  //       the num pad or the rest of the keyboard.  Investigating how
+  //       TranslateMessage() generates the WM_KEYCHAR from an
+  //       ALT + <NumPad sequences> it appears it looks at the extended key flag
+  //       (which is on if the key pressed comes from one of the 3 clusters to
+  //       the left of the numeric keypad).  So we use it as well.
+  return ((flags() & ui::EF_EXTENDED) == 0) &&
+      ((key_code_ >= VK_PRIOR && key_code_ <= VK_DOWN) ||  // All but 0 and 5.
+       (key_code_ == VK_CLEAR) || (key_code_ == VK_INSERT));  // Keys 0 and 5.
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // MouseEvent, public: