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

content/browser/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 import("//ppapi/features/features.gni")
 import("//printing/features/features.gni")
 import("//third_party/WebKit/public/public_features.gni")
@@ skipping 1366 matching lines @@
     "web_contents/aura/gesture_nav_simple.cc",
     "web_contents/aura/gesture_nav_simple.h",
     "web_contents/aura/overscroll_navigation_overlay.cc",
     "web_contents/aura/overscroll_navigation_overlay.h",
     "web_contents/aura/overscroll_window_animation.cc",
     "web_contents/aura/overscroll_window_animation.h",
     "web_contents/aura/overscroll_window_delegate.cc",
     "web_contents/aura/overscroll_window_delegate.h",
     "web_contents/aura/shadow_layer_delegate.cc",
     "web_contents/aura/shadow_layer_delegate.h",
+    "web_contents/aura/uma_navigation_type.h",
     "web_contents/web_contents_impl.cc",
     "web_contents/web_contents_impl.h",
     "web_contents/web_contents_view.h",
     "web_contents/web_contents_view_aura.cc",
     "web_contents/web_contents_view_aura.h",
     "web_contents/web_contents_view_child_frame.cc",
     "web_contents/web_contents_view_child_frame.h",
     "web_contents/web_contents_view_guest.cc",
     "web_contents/web_contents_view_guest.h",
     "web_contents/web_contents_view_mac.h",
@@ skipping 618 matching lines @@
   if (!is_component_build) {
     public_deps = [
       ":browser",
     ]
   } else {
     public_deps = [
       "//third_party/leveldatabase",
     ]
   }
 }