Enable OmniboxViewViews uitest

The reason of OmniboxViewViews test failures are basically on
touches, and that's because EventInjector is not used.
This CL sets nullptr for EventGenerator to use EventInjector.

BUG=883523
TEST=interactive_ui_tests

Change-Id: I394b9b11d6efc6826a45da407b79cee328224dcf
Reviewed-on: https://chromium-review.googlesource.com/c/1283929Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Jun Mukai <mukai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600606}

chrome/browser/ui/views/omnibox/omnibox_view_views_browsertest.cc

@@ -33,6 +33,7 @@
 #include "ui/base/ime/text_edit_commands.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/base/test/ui_controls.h"
+#include "ui/base/ui_base_features.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/events/event_processor.h"
 #include "ui/events/event_utils.h"
@@ -97,7 +98,12 @@ class OmniboxViewViewsTest : public InProcessBrowserTest {
   // Touch down and release at the specified locations.
   void Tap(const gfx::Point& press_location,
            const gfx::Point& release_location) {
-    ui::test::EventGenerator generator(browser()->window()->GetNativeWindow());
+    gfx::NativeWindow window = browser()->window()->GetNativeWindow();
+#if defined(OS_CHROMEOS)
+    if (features::IsUsingWindowService())
+      window = nullptr;
+#endif
+    ui::test::EventGenerator generator(window);
     if (press_location == release_location) {
       generator.GestureTapAt(press_location);
     } else {

testing/buildbot/filters/chromeos.single_process_mash.interactive_ui_tests.filter

@@ -21,8 +21,6 @@
 
 # misc.
 -DevToolsManagerDelegateTest.ShowMinimizedWindow
--OmniboxViewViewsTest.DeactivateTouchEditingOnExecuteCommand
--OmniboxViewViewsTest.SelectAllOnTap
 -WindowActivityWatcherTest.Basic
 -WindowActivityWatcherTest.MultipleWindows
 -WindowActivityWatcherTest.WindowActivation