Fix WebView accessibility

chrome/browser/apps/guest_view/web_view_browsertest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <queue>
 #include <utility>
 
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/path_service.h"
@@ skipping 2687 matching lines @@
              "web_view/shim", NEEDS_TEST_SERVER);
 }
 
 // Tests that a WebView accessible resource can actually be loaded from a
 // webpage in a WebView.
 IN_PROC_BROWSER_TEST_P(WebViewTest, LoadWebviewAccessibleResource) {
   TestHelper("testLoadWebviewAccessibleResource",
              "web_view/load_webview_accessible_resource", NEEDS_TEST_SERVER);
 }
 
+IN_PROC_BROWSER_TEST_P(WebViewTest, FocusAccessibility) {
+  LoadAppWithGuest("web_view/focus_accessibility");
+  content::WebContents* web_contents = GetFirstAppWindowWebContents();
+  content::EnableAccessibilityForWebContents(web_contents);
+  content::WebContents* guest_web_contents = GetGuestWebContents();
+  content::EnableAccessibilityForWebContents(guest_web_contents);
+
+  // Wait for focus to land on the "root web area" role, representing
+  // focus on the main document itself.
+  while (content::GetFocusedAccessibilityNodeInfo(web_contents).role !=
+             ui::AX_ROLE_ROOT_WEB_AREA) {
+    content::WaitForAccessibilityFocusChange();
+  }
+
+  // Now keep pressing the Tab key until focus lands on a button.
+  while (content::GetFocusedAccessibilityNodeInfo(web_contents).role !=
+             ui::AX_ROLE_BUTTON) {
+    content::SimulateKeyPress(
+        web_contents, ui::VKEY_TAB, false, false, false, false);
+    content::WaitForAccessibilityFocusChange();
+  }
+
+  // Ensure that we hit the button inside the guest frame labeled
+  // "Guest button".
+  ui::AXNodeData node_data =
+      content::GetFocusedAccessibilityNodeInfo(web_contents);
+  EXPECT_EQ("Guest button", node_data.GetStringAttribute(ui::AX_ATTR_NAME));
+}
+
 class WebViewGuestScrollTest
     : public WebViewTestBase,
       public testing::WithParamInterface<testing::tuple<bool, bool>> {
  protected:
   WebViewGuestScrollTest() {}
   ~WebViewGuestScrollTest() {}
 
   void SetUpCommandLine(base::CommandLine* command_line) override {
     WebViewTestBase::SetUpCommandLine(command_line);
 
@@ skipping 395 matching lines @@
   // 4 tasks expected. The order is arbitrary.
   // Tab: about:blank,
   // Background Page: <webview> task manager test,
   // App: <webview> task manager test,
   // Webview: WebViewed test content.
   EXPECT_EQ(4U, task_manager.tasks().size());
   EXPECT_TRUE(HasExpectedGuestTask(task_manager, guest_contents));
 }
 
 #endif  // defined(ENABLE_TASK_MANAGER)