Handle touch accessibility in PageWidgetDelegate instead of WebViewImpl.

content/browser/accessibility/touch_accessibility_aura_browsertest.cc

 // Copyright 2015 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 "base/macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/accessibility/accessibility_test_utils.h"
 #include "content/browser/accessibility/browser_accessibility.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/test/browser_test_utils.h"
@@ skipping 131 matching lines @@
   SendTouchExplorationEvent(50, 350);
   waiter.WaitForNotification();
   int target_id = waiter.event_target_id();
   BrowserAccessibility* hit = child_manager->GetFromID(target_id);
   EXPECT_EQ(ui::AX_ROLE_BUTTON, hit->GetData().role);
   std::string text = hit->GetData().GetStringAttribute(ui::AX_ATTR_NAME);
   EXPECT_EQ("Ordinary Button", text);
 }
 
 IN_PROC_BROWSER_TEST_F(TouchAccessibilityBrowserTest,
-                       DISABLED_TouchExplorationInCrossSiteIframe) {
+                       TouchExplorationInCrossSiteIframe) {
   NavigateToUrlAndWaitForAccessibilityTree(
       embedded_test_server()->GetURL(
           "/accessibility/html/iframe-coordinates-cross-process.html"));
 
   WaitForAccessibilityTreeToContainNodeWithName(
       shell()->web_contents(), "Ordinary Button");
 
   // Get the BrowserAccessibilityManager for the first child frame.
   RenderFrameHostImpl* main_frame = static_cast<RenderFrameHostImpl*>(
       shell()->web_contents()->GetMainFrame());
@@ skipping 11 matching lines @@
   SendTouchExplorationEvent(50, 350);
   waiter.WaitForNotification();
   int target_id = waiter.event_target_id();
   BrowserAccessibility* hit = child_manager->GetFromID(target_id);
   EXPECT_EQ(ui::AX_ROLE_BUTTON, hit->GetData().role);
   std::string text = hit->GetData().GetStringAttribute(ui::AX_ATTR_NAME);
   EXPECT_EQ("Ordinary Button", text);
 }
 
 }  // namespace content