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

Add the usual implicit-animation supression system.

BUG=463988

Review URL: https://codereview.chromium.org/983523002

Cr-Commit-Position: refs/heads/master@{#319190}

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();