cc: Add LayerTreeSetting to disable cached picture raster.

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 7828dcb25cf0abd9c8d1b5d258233e7ef7c4d80b..5872b42692354e98417f8a68149095d7b77bb70a 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -466,6 +466,9 @@ void RenderWidgetCompositor::Initialize(float device_scale_factor) {
   cc::ManagedMemoryPolicy current = settings.memory_policy_;
   settings.memory_policy_ = GetGpuMemoryPolicy(current);
 
+  settings.use_cached_picture_raster = !cmd->HasSwitch(
+      cc::switches::kDisableCachedPictureRaster);
+
   scoped_refptr<base::SingleThreadTaskRunner> compositor_thread_task_runner =
       compositor_deps_->GetCompositorImplThreadTaskRunner();
   scoped_refptr<base::SingleThreadTaskRunner>