cc: Remove unused use_pinch_zoom_scrollbars flag.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index df8674a24e1730b1cb2f621e17988549de0b1767..bb300271fd732cc816e111ff87077ba2802f186b 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -433,10 +433,7 @@ void RenderWidgetCompositor::Initialize() {
   if (ui::IsOverlayScrollbarEnabled()) {
     settings.scrollbar_animator = cc::LayerTreeSettings::THINNING;
     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
-  } else if (cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport)) {
-    // use_pinch_zoom_scrollbars is only true on desktop when non-overlay
-    // scrollbars are in use.
-    settings.use_pinch_zoom_scrollbars = true;
+  } else if (settings.use_pinch_virtual_viewport) {
     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
   }