Working proof of concept of select to speak

chrome/browser/chromeos/accessibility/spoken_feedback_event_rewriter.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 "chrome/browser/chromeos/accessibility/spoken_feedback_event_rewriter.h"
 
 #include <string>
 
 #include "ash/shell.h"
 #include "chrome/browser/chromeos/accessibility/accessibility_manager.h"
@@ skipping 98 matching lines @@
     scoped_ptr<SpokenFeedbackEventRewriterDelegate> delegate) {
   delegate_ = delegate.Pass();
 }
 
 ui::EventRewriteStatus SpokenFeedbackEventRewriter::RewriteEvent(
     const ui::Event& event,
     scoped_ptr<ui::Event>* new_event) {
   if (!delegate_->IsSpokenFeedbackEnabled())
     return ui::EVENT_REWRITE_CONTINUE;
 
+  if (event.IsMouseEvent()) {
+    const auto& mouse_event = static_cast<const ui::MouseEvent&>(event);
+    scoped_ptr<ui::MouseEvent> ax_mouse_event(
+        new ui::MouseEvent(mouse_event.type(),
+                           mouse_event.location(),
+                           mouse_event.root_location(),
+                           mouse_event.time_stamp(),
+                           mouse_event.flags() | ui::EF_TOUCH_ACCESSIBILITY,
+                           mouse_event.changed_button_flags()));
+    *new_event = ax_mouse_event.Pass();
+    return ui::EVENT_REWRITE_REWRITTEN;
+  }
+
   if ((event.type() != ui::ET_KEY_PRESSED &&
        event.type() != ui::ET_KEY_RELEASED))
     return ui::EVENT_REWRITE_CONTINUE;
 
   const ui::KeyEvent key_event = static_cast<const ui::KeyEvent&>(event);
   if (delegate_->DispatchKeyEventToChromeVox(key_event))
     return ui::EVENT_REWRITE_DISCARD;
   return ui::EVENT_REWRITE_CONTINUE;
 }
 
 ui::EventRewriteStatus SpokenFeedbackEventRewriter::NextDispatchEvent(
     const ui::Event& last_event,
     scoped_ptr<ui::Event>* new_event) {
   return ui::EVENT_REWRITE_CONTINUE;
 }