Rendering context information added to SharedQuadState

cc/trees/layer_tree_impl_unittest.cc

Index: cc/trees/layer_tree_impl_unittest.cc
diff --git a/cc/trees/layer_tree_impl_unittest.cc b/cc/trees/layer_tree_impl_unittest.cc
index 8db2b9567c4ec679ebd77751b54fdcd326c7d3ec..345cb1f3ae309160e411c847b79f2aa278b8c6fe 100644
--- a/cc/trees/layer_tree_impl_unittest.cc
+++ b/cc/trees/layer_tree_impl_unittest.cc
@@ -983,7 +983,7 @@ TEST_F(LayerTreeImplTest, HitTestingForMultipleLayersAtVaryingDepths) {
                                false);
   root->SetDrawsContent(true);
   root->SetShouldFlattenTransform(false);
-  root->SetIs3dSorted(true);
+  root->SetRenderingContextId(1);  // For 3D sorting

[danakj, 2014/06/15 18:15:36]

If every call of this method needs a comment explaining it is for 3d sorting,
maybe we should improve the method name. How about Set3dSortingContextId()?

I know this matches the WebLayerImpl name, but it seems like we should improve
that name too then.

[troyhildebrandt, 2014/06/17 00:29:43]

Changed to Set3dSortingContextId for Layer/LayerImpl, but changing it in
WebLayerImpl requires making changes to WebLayer.h, GraphicsLayer.cpp/h, and
CompositedLayerMapping.cpp and I'm not sure if we want to change these at this
point.

   {
     // child 1 and child2 are initialized to overlap between x=50 and x=60.
     // grand_child is set to overlap both child1 and child2 between y=50 and
@@ -1009,7 +1009,7 @@ TEST_F(LayerTreeImplTest, HitTestingForMultipleLayersAtVaryingDepths) {
                                  false);
     child1->SetDrawsContent(true);
     child1->SetShouldFlattenTransform(false);
-    child1->SetIs3dSorted(true);
+    child1->SetRenderingContextId(1);  // For 3D sorting
 
     position = gfx::PointF(50.f, 10.f);
     bounds = gfx::Size(50, 50);
@@ -1024,7 +1024,7 @@ TEST_F(LayerTreeImplTest, HitTestingForMultipleLayersAtVaryingDepths) {
                                  false);
     child2->SetDrawsContent(true);
     child2->SetShouldFlattenTransform(false);
-    child2->SetIs3dSorted(true);
+    child2->SetRenderingContextId(1);  // For 3D sorting;
 
     // Remember that grand_child is positioned with respect to its parent (i.e.
     // child1).  In screen space, the intended position is (10, 50), with size