Revert of Disable scrollbar snapback on desktop Linux

content/renderer/BUILD.gn

Index: content/renderer/BUILD.gn
diff --git a/content/renderer/BUILD.gn b/content/renderer/BUILD.gn
index 7b2bbada4776a83a8c6ddc42f63a5499764f8559..aaadc67e58a0a71faeb867f17e78b4bb0b205e68 100644
--- a/content/renderer/BUILD.gn
+++ b/content/renderer/BUILD.gn
@@ -380,8 +380,8 @@
     "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",
@@ -482,8 +482,8 @@
 
   if (is_mac) {
     sources -= [
-      "webscrollbarbehavior_impl_aura.cc",
-      "webscrollbarbehavior_impl_aura.h",
+      "webscrollbarbehavior_impl_gtkoraura.cc",
+      "webscrollbarbehavior_impl_gtkoraura.h",
     ]
   }