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

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <tuple>
@@ skipping 138 matching lines @@
     return true;
   }
 
   void OnOverscrollComplete(OverscrollMode overscroll_mode) override {
     EXPECT_EQ(current_mode_, overscroll_mode);
     completed_mode_ = overscroll_mode;
     current_mode_ = OVERSCROLL_NONE;
   }
 
   void OnOverscrollModeChange(OverscrollMode old_mode,
-                              OverscrollMode new_mode) override {
+                              OverscrollMode new_mode,
+                              OverscrollSource source) override {
     EXPECT_EQ(current_mode_, old_mode);
     current_mode_ = new_mode;
     delta_x_ = delta_y_ = 0.f;
   }
 
   RenderWidgetHostView* view_;
   OverscrollMode current_mode_;
   OverscrollMode completed_mode_;
   float delta_x_;
   float delta_y_;
@@ skipping 4597 matching lines @@
     // There is no composition in the beginning.
     EXPECT_FALSE(has_composition_text());
     SetHasCompositionTextToTrue();
     view->ImeCancelComposition();
     // The composition must have been canceled.
     EXPECT_FALSE(has_composition_text());
   }
 }
 
 }  // namespace content