Remove enable-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 89cc3d3204cad87d8d6082dd3ac58abdacffe3e4..c5f09bf611d88521f22485dc64704d599ed8a526 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -187,11 +187,6 @@ scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create(
   settings.show_overdraw_in_tracing =
       cmd->HasSwitch(cc::switches::kTraceOverdraw);
 
-#if defined(OS_WIN) || defined(OS_LINUX) || defined(OS_CHROMEOS)
-  settings.use_pinch_zoom_scrollbars =
-      cmd->HasSwitch(cc::switches::kEnablePinchZoomScrollbars);
-#endif
-
   // These flags should be mirrored by UI versions in ui/compositor/.
   settings.initial_debug_state.show_debug_borders =
       cmd->HasSwitch(cc::switches::kShowCompositedLayerBorders);