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

chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc

Index: chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc
diff --git a/chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc b/chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc
index e4d237ae8fb8e947013ee1efcb0815a1f5857e35..4bc5f681e16cd6d90e1f33291c6f2ffbe1cf7cee 100644
--- a/chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc
+++ b/chrome/browser/chromeos/accessibility/select_to_speak_event_handler.cc
@@ -19,13 +19,17 @@
 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) {