Add User Actions and adding more details to UMA metrics for overscroll navigation

content/browser/web_contents/web_contents_view_aura.h

 // 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_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 130 matching lines @@
                      bool allow_multiple_selection) override;
 
   void HidePopupMenu() override;
 #endif
 
   // Overridden from OverscrollControllerDelegate:
   gfx::Rect GetVisibleBounds() const override;
   bool OnOverscrollUpdate(float delta_x, float delta_y) override;
   void OnOverscrollComplete(OverscrollMode overscroll_mode) override;
   void OnOverscrollModeChange(OverscrollMode old_mode,
-                              OverscrollMode new_mode) override;
+                              OverscrollMode new_mode,
+                              OverscrollSource source) override;
 
   // Overridden from aura::WindowDelegate:
   gfx::Size GetMinimumSize() const override;
   gfx::Size GetMaximumSize() const override;
   void OnBoundsChanged(const gfx::Rect& old_bounds,
                        const gfx::Rect& new_bounds) override;
   gfx::NativeCursor GetCursor(const gfx::Point& point) override;
   int GetNonClientComponent(const gfx::Point& point) const override;
   bool ShouldDescendIntoChildForEventHandling(
       aura::Window* child,
@@ skipping 75 matching lines @@
   std::unique_ptr<GestureNavSimple> gesture_nav_simple_;
 
   bool init_rwhv_with_null_parent_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_AURA_H_