Pinch/Zoom Infrastructure & Plumbing CL

cc/layers/solid_color_scrollbar_layer.cc

Index: cc/layers/solid_color_scrollbar_layer.cc
diff --git a/cc/layers/solid_color_scrollbar_layer.cc b/cc/layers/solid_color_scrollbar_layer.cc
index d9ed922e5d893e9744d23ad38ca2d98f0a91126e..196b7e86ab3779d10bf8275fc03a048a1b23e3eb 100644
--- a/cc/layers/solid_color_scrollbar_layer.cc
+++ b/cc/layers/solid_color_scrollbar_layer.cc
@@ -12,29 +12,35 @@ namespace cc {
 
 scoped_ptr<LayerImpl> SolidColorScrollbarLayer::CreateLayerImpl(
     LayerTreeImpl* tree_impl) {
+  const bool kIsOverlayScrollbar = true;
   return SolidColorScrollbarLayerImpl::Create(
-      tree_impl, id(), orientation(), thumb_thickness_,
-      is_left_side_vertical_scrollbar_).PassAs<LayerImpl>();
+             tree_impl,
+             id(),
+             orientation(),
+             thumb_thickness_,
+             is_left_side_vertical_scrollbar_,
+             kIsOverlayScrollbar).PassAs<LayerImpl>();
 }
 
 scoped_refptr<SolidColorScrollbarLayer> SolidColorScrollbarLayer::Create(
     ScrollbarOrientation orientation,
     int thumb_thickness,
     bool is_left_side_vertical_scrollbar,
-    int scroll_layer_id) {
+    Layer* scroll_layer) {
   return make_scoped_refptr(new SolidColorScrollbarLayer(
       orientation,
       thumb_thickness,
       is_left_side_vertical_scrollbar,
-      scroll_layer_id));
+      scroll_layer));
 }
 
 SolidColorScrollbarLayer::SolidColorScrollbarLayer(
     ScrollbarOrientation orientation,
     int thumb_thickness,
     bool is_left_side_vertical_scrollbar,
-    int scroll_layer_id)
-    : scroll_layer_id_(scroll_layer_id),
+    Layer* scroll_layer)
+    : scroll_layer_(scroll_layer),
+      clip_layer_(NULL),
       orientation_(orientation),
       thumb_thickness_(thumb_thickness),
       is_left_side_vertical_scrollbar_(is_left_side_vertical_scrollbar) {}
@@ -45,19 +51,42 @@ ScrollbarLayerInterface* SolidColorScrollbarLayer::ToScrollbarLayer() {
   return this;
 }
 
+void SolidColorScrollbarLayer::PushPropertiesTo(LayerImpl* layer) {
+  Layer::PushPropertiesTo(layer);
+  PushScrollClipPropertiesTo(layer);
+}
+
+void SolidColorScrollbarLayer::PushScrollClipPropertiesTo(LayerImpl* layer) {
+  SolidColorScrollbarLayerImpl* scrollbar_layer =
+      static_cast<SolidColorScrollbarLayerImpl*>(layer);
+
+  scrollbar_layer->SetScrollLayerById(scroll_layer_ ? scroll_layer_->id()
+                                                    : Layer::INVALID_ID);
+  scrollbar_layer->SetClipLayerById(clip_layer_ ? clip_layer_->id()
+                                                : Layer::INVALID_ID);
+}
+
 bool SolidColorScrollbarLayer::OpacityCanAnimateOnImplThread() const {
   return true;
 }
 
 int SolidColorScrollbarLayer::ScrollLayerId() const {
-  return scroll_layer_id_;
+  return scroll_layer_->id();
+}
+
+void SolidColorScrollbarLayer::SetScrollLayer(scoped_refptr<Layer> layer) {
+  if (layer == scroll_layer_)
+    return;
+
+  scroll_layer_ = layer;
+  SetNeedsFullTreeSync();
 }
 
-void SolidColorScrollbarLayer::SetScrollLayerId(int id) {
-  if (id == scroll_layer_id_)
+void SolidColorScrollbarLayer::SetClipLayer(scoped_refptr<Layer> layer) {
+  if (layer == clip_layer_)
     return;
 
-  scroll_layer_id_ = id;
+  clip_layer_ = layer;
   SetNeedsFullTreeSync();
 }