Remove fade animation on tab-switch when using the 10.9 SDK

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 78594232ff08a409cd787df036f8031d9e350ed6..7f3cb354dc05c946fc6ce1534b5eb6a1ebcd1fea 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -829,6 +829,7 @@ RenderWidgetHost* RenderWidgetHostViewMac::GetRenderWidgetHost() const {
 }
 
 void RenderWidgetHostViewMac::Show() {
+  ScopedCAActionDisabler disabler;
   [cocoa_view_ setHidden:NO];
   if (!render_widget_host_->is_hidden())
     return;
@@ -842,6 +843,7 @@ void RenderWidgetHostViewMac::Show() {
 }
 
 void RenderWidgetHostViewMac::Hide() {
+  ScopedCAActionDisabler disabler;
   [cocoa_view_ setHidden:YES];
   WasOccluded();
   DestroySuspendedBrowserCompositorViewIfNeeded();