Fix computation of Automation API location offsets in WebViews.

chrome/browser/extensions/api/automation_internal/automation_internal_api.cc

 // Copyright 2014 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 "chrome/browser/extensions/api/automation_internal/automation_internal_api.h"
 
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
@@ skipping 158 matching lines @@
   // content::WebContentsObserver overrides.
   void AccessibilityEventReceived(
       const std::vector<content::AXEventNotificationDetails>& details)
       override {
     for (const auto& event : details) {
       ExtensionMsg_AccessibilityEventParams params;
       params.tree_id = event.ax_tree_id;
       params.id = event.id;
       params.event_type = event.event_type;
       params.update = event.update;
-      params.location_offset =
-          web_contents()->GetContainerBounds().OffsetFromOrigin();
       params.event_from = event.event_from;
 
       AutomationEventRouter* router = AutomationEventRouter::GetInstance();
       router->DispatchAccessibilityEvent(params);
     }
   }
 
   void AccessibilityLocationChangesReceived(
       const std::vector<content::AXLocationChangeNotificationDetails>& details)
       override {
@@ skipping 318 matching lines @@
     int result_acc_obj_id) {
   if (!error.empty()) {
     Respond(Error(error));
     return;
   }
 
   Respond(OneArgument(base::MakeUnique<base::Value>(result_acc_obj_id)));
 }
 
 }  // namespace extensions