Enable interactive_ui_tests on Windows that now run mostly reliably.

r516772 was the last of many commits that resolved a number of problems
that made this test suite flaky on Windows. This CL enables tests that
had been disabled over time due to flakes, yet now seem to run okay.

BUG=421116,764415
This CL was uploaded by git cl split.

R=aleventhal@chromium.org

Change-Id: I4a673a21eaab43d7dbce3bc121bd7cb8a704b3ba
Reviewed-on: https://chromium-review.googlesource.com/785013
Commit-Queue: Greg Thompson <grt@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#521361}

chrome/browser/ui/views/accessibility/navigation_accessibility_uitest_win.cc

@@ -203,9 +203,7 @@ class NavigationAccessibilityTest : public InProcessBrowserTest {
 
 // Tests that when focus is in the omnibox and the user types a url and
 // presses enter, no focus events are sent on the old document.
-// TODO(dmazzoni): enable this test.  http://crbug.com/421116
-IN_PROC_BROWSER_TEST_F(NavigationAccessibilityTest,
-                       DISABLED_TestNavigateToNewUrl) {
+IN_PROC_BROWSER_TEST_F(NavigationAccessibilityTest, TestNavigateToNewUrl) {
   content::BrowserAccessibilityState::GetInstance()->EnableAccessibility();
 
   ui_test_utils::NavigateToURL(browser(),