Select-to-speak event handler should be on root window, not ash Shell.

chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc

 // Copyright 2016 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/chromeos/accessibility/select_to_speak_event_handler.h"
 
 #include "ash/shell.h"
 #include "base/logging.h"
 #include "chrome/browser/speech/tts_controller.h"
 #include "chrome/browser/ui/aura/accessibility/automation_manager_aura.h"
 #include "content/public/browser/browser_thread.h"
 #include "ui/aura/window.h"
 #include "ui/display/display.h"
 #include "ui/events/event.h"
 #include "ui/views/focus/view_storage.h"
 #include "ui/views/view.h"
 #include "ui/views/widget/widget.h"
 
 namespace chromeos {
 
 SelectToSpeakEventHandler::SelectToSpeakEventHandler() {
-  if (ash::Shell::HasInstance())
-    ash::Shell::GetInstance()->AddPreTargetHandler(this);
+  if (ash::Shell::HasInstance()) {
+    ash::Shell::GetInstance()->GetPrimaryRootWindow()->AddPreTargetHandler(
+        this);
+  }
 }
 
 SelectToSpeakEventHandler::~SelectToSpeakEventHandler() {
-  if (ash::Shell::HasInstance())
-    ash::Shell::GetInstance()->RemovePreTargetHandler(this);
+  if (ash::Shell::HasInstance()) {
+    ash::Shell::GetInstance()->GetPrimaryRootWindow()->RemovePreTargetHandler(
+        this);
+  }
 }
 
 void SelectToSpeakEventHandler::OnKeyEvent(ui::KeyEvent* event) {
   DCHECK(event);
 
   // We can only call TtsController on the UI thread, make sure we
   // don't ever try to run this code on some other thread.
   CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 
   ui::KeyboardCode key_code = event->key_code();
@@ skipping 140 matching lines @@
           : nullptr;
   if (last_view) {
     last_view->NotifyAccessibilityEvent(ui::AX_EVENT_MOUSE_CANCELED, true);
   } else {
     AutomationManagerAura::GetInstance()->HandleEvent(
         nullptr, nullptr, ui::AX_EVENT_MOUSE_CANCELED);
   }
 }
 
 }  // namespace chromeos