Add verbose logging for native accessibility events.

content/browser/accessibility/browser_accessibility_event_win.h

+// 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.
+
+#ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_EVENT_WIN_H_
+#define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_EVENT_WIN_H_
+
+#include <oleacc.h>
+
+#include "content/browser/accessibility/browser_accessibility_event.h"
+
+namespace content {
+
+class CONTENT_EXPORT BrowserAccessibilityEventWin
+    : public BrowserAccessibilityEvent {
+ public:
+  BrowserAccessibilityEventWin(Source source,
+                               ui::AXEvent event_type,
+                               LONG win_event_type,
+                               const BrowserAccessibility* target);
+  ~BrowserAccessibilityEventWin() override;
+
+  LONG win_event_type() { return win_event_type_; }
+
+  Result Fire() override;
+
+ protected:
+  std::string GetEventNameStr() override;
+
+  LONG win_event_type_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityEventWin);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_EVENT_WIN_H_