Pinch/Zoom Infrastructure & Plumbing CL

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/gpu/render_widget_compositor.h"
 
 #include <limits>
 #include <string>
 
 #if defined(OS_ANDROID)
@@ skipping 286 matching lines @@
       base::android::SysUtils::IsLowEndDevice() &&
       !widget->UsingSynchronousRendererCompositor() &&
       !cmd->HasSwitch(cc::switches::kDisable4444Textures);
 #elif !defined(OS_MACOSX)
   if (cmd->HasSwitch(switches::kEnableOverlayScrollbars)) {
     settings.scrollbar_animator = cc::LayerTreeSettings::Thinning;
   }
   if (cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport) ||
       cmd->HasSwitch(switches::kEnableOverlayScrollbars)) {
     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
+    settings.scrollbar_animator = cc::LayerTreeSettings::LinearFade;
   }
 #endif
 
   if (!compositor->initialize(settings))
     return scoped_ptr<RenderWidgetCompositor>();
 
   return compositor.Pass();
 }
 
 RenderWidgetCompositor::RenderWidgetCompositor(RenderWidget* widget,
@@ skipping 321 matching lines @@
   if (!suppress_schedule_composite_)
     widget_->scheduleComposite();
 }
 
 scoped_refptr<cc::ContextProvider>
 RenderWidgetCompositor::OffscreenContextProvider() {
   return RenderThreadImpl::current()->OffscreenCompositorContextProvider();
 }
 
 }  // namespace content