Add plumbing for scroll parent.

Plumbs the scroll parent information into the cc layer trees. These relationships are not yet used. (That task is accomplished here https://codereview.chromium.org/18191009/).

R=shawnsingh@chromium.org
BUG=254435

Review URL: https://chromiumcodereview.appspot.com/18133004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@219026 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 17 insertions, 0 deletions

diff --git a/webkit/renderer/compositor_bindings/web_layer_impl.cc b/webkit/renderer/compositor_bindings/web_layer_impl.cc
index f04e362..f2a3cde 100644
--- a/webkit/renderer/compositor_bindings/web_layer_impl.cc
+++ b/webkit/renderer/compositor_bindings/web_layer_impl.cc
@@ -379,6 +379,20 @@ std::string WebLayerImpl::DebugName() {
   return name;
 }
 
+void WebLayerImpl::setScrollParent(WebKit::WebLayer* parent) {
+  cc::Layer* scroll_parent = NULL;
+  if (parent)
+    scroll_parent = static_cast<WebLayerImpl*>(parent)->layer();
+  layer_->SetScrollParent(scroll_parent);
+}
+
+void WebLayerImpl::setClipParent(WebKit::WebLayer* parent) {
+  cc::Layer* clip_parent = NULL;
+  if (parent)
+    clip_parent = static_cast<WebLayerImpl*>(parent)->layer();
+  layer_->SetClipParent(clip_parent);
+}
+
 Layer* WebLayerImpl::layer() const { return layer_.get(); }
 
 }  // namespace webkit
diff --git a/webkit/renderer/compositor_bindings/web_layer_impl.h b/webkit/renderer/compositor_bindings/web_layer_impl.h
index 10b5a1a..169b818 100644
--- a/webkit/renderer/compositor_bindings/web_layer_impl.h
+++ b/webkit/renderer/compositor_bindings/web_layer_impl.h
@@ -126,6 +126,9 @@ class WebLayerImpl : public WebKit::WebLayer, public cc::LayerClient {
   // LayerClient implementation.
   virtual std::string DebugName() OVERRIDE;
 
+  virtual void setScrollParent(WebKit::WebLayer* parent);
+  virtual void setClipParent(WebKit::WebLayer* parent);
+
  protected:
   scoped_refptr<cc::Layer> layer_;
   WebKit::WebLayerClient* web_layer_client_;