MacViews: Get widget_interactive_uitest compiling on Mac

MacViews: Get widget_interactive_uitest compiling on Mac

This is done by refactoring some tests to observe focus changes in a
cross-platform manner, and by converting some custom-crafted events to
use the cross-platform event generator.

For now, the code that is only enabled on Windows is unchanged. This
still has aura dependencies, but I hope to enable some of these tests on
Mac in future.

BUG=399191
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287944

[tapted, 2014-08-05 13:42:26]

Hi sky, please take a look. (this is split of from the "big picture" CL in
crrev/433403002).

https://codereview.chromium.org/444583002/diff/20001/ui/views/widget/widget_i...
File ui/views/widget/widget_interactive_uitest.cc (right):

https://codereview.chromium.org/444583002/diff/20001/ui/views/widget/widget_i...
ui/views/widget/widget_interactive_uitest.cc:176: #endif
This is to avoid a link error, and is all that strictly necessary here to get
interactive_ui_tests to link. Looking at it again though, maybe more should be
guarded (along with the touchui #include), or these tests should be moved to a
separate file for touch. Let me know what you think.

[sky, 2014-08-05 17:15:52]

https://codereview.chromium.org/444583002/diff/20001/ui/views/test/widget_test.h
File ui/views/test/widget_test.h (right):

https://codereview.chromium.org/444583002/diff/20001/ui/views/test/widget_tes...
ui/views/test/widget_test.h:103: static gfx::NativeWindow
CurrentlyFocussedWindow(Widget* widget_context);
focused

https://codereview.chromium.org/444583002/diff/20001/ui/views/test/widget_tes...
ui/views/test/widget_test.h:103: static gfx::NativeWindow
CurrentlyFocussedWindow(Widget* widget_context);
This is confusing that it takes a widget_context, and I don't think it really
returns the focused nativewindow for desktop aura. I also think this should move
to the one place that needs it.

[tapted, 2014-08-06 06:37:28]

Hi sky, PTAL at patchset 3 for your consideration.

It refactors the tests to use a WidgetFocusChangeListener, and avoids having to
call any ObjectiveC code (which is hard to keep localized to these tests, since
it needs a .mm file).

I moved the file providing TestWidgetFocusChangeListener into views_test_support
so that interactive_ui_tests could use it.

[sky, 2014-08-06 17:46:58]

LGTM

[tapted, 2014-08-06 23:02:41]

The CQ bit was checked by tapted@chromium.org

[commit-bot: I haz the power, 2014-08-06 23:04:59]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tapted@chromium.org/444583002/60001

[commit-bot: I haz the power, 2014-08-07 02:50:15]

Change committed as 287944