[OriginChip] Add animations for the hiding and showing of the chip.

chrome/browser/ui/gtk/location_bar_view_gtk.cc

Index: chrome/browser/ui/gtk/location_bar_view_gtk.cc
diff --git a/chrome/browser/ui/gtk/location_bar_view_gtk.cc b/chrome/browser/ui/gtk/location_bar_view_gtk.cc
index dde1ff7da27793df5b7563170089ce629b406dcf..e8fa48718fd06524c4cb8f6afc2e08966817e57c 100644
--- a/chrome/browser/ui/gtk/location_bar_view_gtk.cc
+++ b/chrome/browser/ui/gtk/location_bar_view_gtk.cc
@@ -635,6 +635,10 @@ void LocationBarViewGtk::OnSetFocus() {
   OnChanged();
 }
 
+void LocationBarViewGtk::ShowURL() {
+  omnibox_view_->ShowURL();
+}
+
 InstantController* LocationBarViewGtk::GetInstant() {
   return browser_->instant_controller() ?
       browser_->instant_controller()->instant() : NULL;
@@ -1571,6 +1575,10 @@ bool LocationBarViewGtk::ShouldOnlyShowLocation() {
   return !browser_->is_type_tabbed();
 }
 
+void LocationBarViewGtk::HideURL() {
+  omnibox_view_->HideURL();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // LocationBarViewGtk::PageToolViewGtk