Make the maximize button more easily hittable when there is a huge amount of tabs present

ash/wm/system_gesture_event_filter_unittest.cc

Index: ash/wm/system_gesture_event_filter_unittest.cc
diff --git a/ash/wm/system_gesture_event_filter_unittest.cc b/ash/wm/system_gesture_event_filter_unittest.cc
index 2238d47f0bffd7c10a297ec4c58518ec37b2d950..71a9c6cbcf2c321e89e54e21e1421bc349b26fd3 100644
--- a/ash/wm/system_gesture_event_filter_unittest.cc
+++ b/ash/wm/system_gesture_event_filter_unittest.cc
@@ -153,7 +153,7 @@ class MaxSizeNCFV : public views::NonClientFrameView {
   // the parent NonClientView because that makes it more difficult to calculate
   // hittests for regions that are partially obscured by the ClientView, e.g.
   // HTSYSMENU.
-  virtual int NonClientHitTest(const gfx::Point& point) OVERRIDE {
+  virtual int NonClientHitTest(const gfx::Point& point) const OVERRIDE {
     return HTNOWHERE;
   }
   virtual void GetWindowMask(const gfx::Size& size,