make NavigationGesture part of public content API and use it outside content

content/common/navigation_gesture.h

Index: content/common/navigation_gesture.h
diff --git a/content/common/navigation_gesture.h b/content/common/navigation_gesture.h
deleted file mode 100644
index 380cd51fff750128236b868b5bfea7761ae16cc7..0000000000000000000000000000000000000000
--- a/content/common/navigation_gesture.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright (c) 2012 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_COMMON_NAVIGATION_GESTURE_H_
-#define CONTENT_COMMON_NAVIGATION_GESTURE_H_
-
-namespace content {
-
-enum NavigationGesture {
-  // User initiated navigation/load.
-  NavigationGestureUser,
-  // Non-user initiated navigation/load. For example, onload- or
-  // setTimeout-triggered document.location changes and form.submits.  See
-  // http://b/1046841 for some cases that should be treated this way but aren't.
-  NavigationGestureAuto,
-  // Initial state.
-  NavigationGestureUnknown,
-  NavigationGestureLast = NavigationGestureUnknown
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_NAVIGATION_GESTURE_H_