Revert of Disable scrollbar snapback on desktop Linux

content/renderer/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("//third_party/webrtc/build/webrtc.gni")
 import("//tools/ipc_fuzzer/ipc_fuzzer.gni")
@@ skipping 362 matching lines @@
     "web_ui_extension.cc",
     "web_ui_extension.h",
     "web_ui_extension_data.cc",
     "web_ui_extension_data.h",
     "webclipboard_impl.cc",
     "webclipboard_impl.h",
     "webgraphicscontext3d_provider_impl.cc",
     "webgraphicscontext3d_provider_impl.h",
     "webpublicsuffixlist_impl.cc",
     "webpublicsuffixlist_impl.h",
-    "webscrollbarbehavior_impl_aura.cc",
-    "webscrollbarbehavior_impl_aura.h",
+    "webscrollbarbehavior_impl_gtkoraura.cc",
+    "webscrollbarbehavior_impl_gtkoraura.h",
     "webscrollbarbehavior_impl_mac.h",
     "webscrollbarbehavior_impl_mac.mm",
     "websharedworker_proxy.cc",
     "websharedworker_proxy.h",
   ]
 
   configs += [
     "//content:content_implementation",
     "//build/config/compiler:no_size_t_to_int_warning",
   ]
@@ skipping 80 matching lines @@
 
   if (use_external_popup_menu) {
     sources += [
       "external_popup_menu.cc",
       "external_popup_menu.h",
     ]
   }
 
   if (is_mac) {
     sources -= [
-      "webscrollbarbehavior_impl_aura.cc",
-      "webscrollbarbehavior_impl_aura.h",
+      "webscrollbarbehavior_impl_gtkoraura.cc",
+      "webscrollbarbehavior_impl_gtkoraura.h",
     ]
   }
 
   if (is_android) {
     # Add back the Linux file which Android shares.
     set_sources_assignment_filter([])
     sources += [ "render_view_linux.cc" ]
 
     deps += [
       "//third_party/android_tools:cpu_features",
@@ skipping 410 matching lines @@
     # For the defines in mojo_media_config.
     public_configs = [ "//media/mojo/services:mojo_media_config" ]
   }
 
   if (!is_component_build) {
     public_deps = [
       ":renderer",
     ]
   }
 }