cc: Add a flag to layers that returns true if the layer is in RSLL.

cc/trees/layer_tree_impl.cc

Index: cc/trees/layer_tree_impl.cc
diff --git a/cc/trees/layer_tree_impl.cc b/cc/trees/layer_tree_impl.cc
index 1014a3f8c5c16446a1752579be7d0061ceddec97..fde446bec6f313edba34e05b489f2ab9e36c3e34 100644
--- a/cc/trees/layer_tree_impl.cc
+++ b/cc/trees/layer_tree_impl.cc
@@ -4,6 +4,8 @@
 
 #include "cc/trees/layer_tree_impl.h"
 
+#include <limits>
+
 #include "base/debug/trace_event.h"
 #include "cc/animation/keyframed_animation_curve.h"
 #include "cc/animation/scrollbar_animation_controller.h"
@@ -97,7 +99,9 @@ LayerTreeImpl::LayerTreeImpl(LayerTreeHostImpl* layer_tree_host_impl)
       viewport_size_invalid_(false),
       needs_update_draw_properties_(true),
       needs_full_tree_sync_(true),
-      next_activation_forces_redraw_(false) {}
+      next_activation_forces_redraw_(false),
+      calculate_draw_properties_id_(0) {
+}
 
 LayerTreeImpl::~LayerTreeImpl() {
   // Need to explicitly clear the tree prior to destroying this so that
@@ -457,6 +461,12 @@ void LayerTreeImpl::UpdateDrawProperties() {
         page_scale_layer_ ? page_scale_layer_ : InnerViewportContainerLayer();
     bool can_render_to_separate_surface =
         !output_surface()->ForcedDrawToSoftwareDevice();
+
+    if (calculate_draw_properties_id_ == std::numeric_limits<int>::max())
+      calculate_draw_properties_id_ = 1;
+    else
+      ++calculate_draw_properties_id_;
+
     LayerTreeHostCommon::CalcDrawPropsImplInputs inputs(
         root_layer(),
         DrawViewportSize(),
@@ -468,7 +478,8 @@ void LayerTreeImpl::UpdateDrawProperties() {
         settings().can_use_lcd_text,
         can_render_to_separate_surface,
         settings().layer_transforms_should_scale_layer_contents,
-        &render_surface_layer_list_);
+        &render_surface_layer_list_,
+        calculate_draw_properties_id_);
     LayerTreeHostCommon::CalculateDrawProperties(&inputs);
   }