Keep track of accessibility focus across windows.

chrome/browser/apps/guest_view/web_view_browsertest.cc

Index: chrome/browser/apps/guest_view/web_view_browsertest.cc
diff --git a/chrome/browser/apps/guest_view/web_view_browsertest.cc b/chrome/browser/apps/guest_view/web_view_browsertest.cc
index 7d5c9c4a8afba1ab4b109c4ca7cb9059da81f01d..54645635bdece3348d4b6cb0b61e17c47d225d96 100644
--- a/chrome/browser/apps/guest_view/web_view_browsertest.cc
+++ b/chrome/browser/apps/guest_view/web_view_browsertest.cc
@@ -2033,7 +2033,10 @@ IN_PROC_BROWSER_TEST_P(WebViewTest, ChromeVoxInjection) {
       "web_view/chromevox_injection");
   ASSERT_TRUE(guest_web_contents);
 
-  EXPECT_EQ("chrome vox test title", monitor.GetNextUtterance());
+  for (;;) {
+    if (monitor.GetNextUtterance() == "chrome vox test title")
+      break;
+  }
 }
 #endif