Adding metrics logging for Simplified Gesture Navigation.

content/browser/web_contents/aura/types.h

Index: content/browser/web_contents/aura/types.h
diff --git a/content/browser/web_contents/aura/uma_navigation_type.h b/content/browser/web_contents/aura/types.h
similarity index 51%
rename from content/browser/web_contents/aura/uma_navigation_type.h
rename to content/browser/web_contents/aura/types.h
index 53294b9d9196368d311d334630d2ac2a872c6b81..4257371468cabfac654a6f7e3000e8e9d87273f8 100644
--- a/content/browser/web_contents/aura/uma_navigation_type.h
+++ b/content/browser/web_contents/aura/types.h
@@ -2,8 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_TYPES_H_
+#define CONTENT_BROWSER_WEB_CONTENTS_AURA_TYPES_H_
+
+#include "content/browser/renderer_host/overscroll_controller.h"
+
 namespace content {
 
+enum class NavigationDirection { NONE, FORWARD, BACK, NAVIGATION_COUNT };
+
 // Note that this enum is used to back an UMA histogram, so it should be
 // treated as append-only.
 enum UmaNavigationType {
@@ -15,4 +22,9 @@ enum UmaNavigationType {
   NAVIGATION_TYPE_COUNT,
 };
 
+UmaNavigationType GetUmaNavigationType(NavigationDirection direction,
+                                       OverscrollSource source);
+
 }  // namespace content
+
+#endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_TYPES_H_