Adds the ability for WebContentsDelegate to decide if event should be updated

content/public/browser/keyboard_event_processing_result.h

+// Copyright 2017 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_PUBLIC_BROWSER_KEYBOARD_EVENT_PROCESSING_RESULT_H_
+#define CONTENT_PUBLIC_BROWSER_KEYBOARD_EVENT_PROCESSING_RESULT_H_
+
+namespace content {
+
+enum class KeyboardEventProcessingResult {
+  // The event was handled.
+  HANDLED,
+
+#if defined(USE_AURA)
+  // The event was handled, but don't update the underlying event. A value
+  // HANDLED results in calling ui::Event::SetHandled(), where as this does not.
+  HANDLED_DONT_UPDATE_EVENT,
+#endif
+
+  // The event was not handled and should be forwarded to the renderer.
+  NOT_HANDLED,
+
+  // The event was not handled and should be forwarded to the renderer.
+  // Additionally the KeyEvent corresponds to a shortcut (aka accelerator).
+  NOT_HANDLED_IS_SHORTCUT,
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_KEYBOARD_EVENT_PROCESSING_RESULT_H_