Added accurate TouchToMouseMode testing to SplitTap

ui/chromeos/touch_exploration_controller_unittest.cc

Index: ui/chromeos/touch_exploration_controller_unittest.cc
diff --git a/ui/chromeos/touch_exploration_controller_unittest.cc b/ui/chromeos/touch_exploration_controller_unittest.cc
index 86582f0ff06b5bc06698b094700dc7c677d3e52e..13d6423939ad2be8f5627ff0dd6d4e90af0c0ea1 100644
--- a/ui/chromeos/touch_exploration_controller_unittest.cc
+++ b/ui/chromeos/touch_exploration_controller_unittest.cc
@@ -790,10 +790,13 @@ TEST_F(TouchExplorationTest, SplitTap) {
   ui::TouchEvent split_tap_press(
       ui::ET_TOUCH_PRESSED, second_touch_location, 1, Now());
   generator_->Dispatch(&split_tap_press);
+  cursor_client()->DisableMouseEvents();

[mfomitchev, 2014/06/27 16:36:05]

A comment explaining that we are simulating the behavior of the real device here
would be helpful.

[tdanderson, 2014/06/27 17:01:07]

I'd also mention that you've added the browser test
TouchExplorationTest.SplitTapExplore to test this without relying on manually
setting the state.

[evy, 2014/06/27 18:03:00]

Done.

[evy, 2014/06/27 18:03:00]

Done.

+  cursor_client()->HideCursor();

[mfomitchev, 2014/06/27 16:36:05]

You can probably get rid of HideCursor() since like you said it stays hidden all
along.

[evy, 2014/06/27 18:03:00]

Done.

   ui::TouchEvent split_tap_release(
       ui::ET_TOUCH_RELEASED, second_touch_location, 1, Now());
   generator_->Dispatch(&split_tap_release);
   EXPECT_FALSE(IsInNoFingersDownState());
+  EXPECT_TRUE(IsInTouchToMouseMode());

[mfomitchev, 2014/06/27 16:36:05]

Comment: Releasing the second finger should re-enable mouse events putting us
back into the touch exploration mode.

[evy, 2014/06/27 18:03:00]

Done.

 
   const ScopedVector<ui::LocatedEvent>& captured_events = GetCapturedEvents();
   ASSERT_EQ(2U, captured_events.size());