Implement new RPDQ copy logic for CALayer promotion.

cc/output/ca_layer_overlay.cc

Index: cc/output/ca_layer_overlay.cc
diff --git a/cc/output/ca_layer_overlay.cc b/cc/output/ca_layer_overlay.cc
index 1336e63cd6847a91689fb0bc0bd6b6515f921a42..7ac25c76260fb077fd6de1db3663e45a9bd8cb28 100644
--- a/cc/output/ca_layer_overlay.cc
+++ b/cc/output/ca_layer_overlay.cc
@@ -70,8 +70,6 @@ CALayerResult FromRenderPassQuad(ResourceProvider* resource_provider,
                                  CALayerOverlay* ca_layer_overlay) {

[ccameron, 2016/08/08 21:48:09]

Cause we're messing with the 3D transforms, we can only trust this to work when
we're just drawing layers on top of each other -- if we have to do
intersections, etc, in 3D space, we're hosed. So we'll need to fail if
sorting_context_id is 0.

   if (quad->background_filters.size() != 0)
     return CA_LAYER_FAILED_RENDER_PASS_BACKGROUND_FILTERS;
-  if (quad->mask_resource_id() != 0)
-    return CA_LAYER_FAILED_RENDER_PASS_MASK;
 
   for (const FilterOperation& operation : quad->filters.operations()) {
     bool success = FilterOperationSupported(operation);
@@ -79,15 +77,7 @@ CALayerResult FromRenderPassQuad(ResourceProvider* resource_provider,
       return CA_LAYER_FAILED_RENDER_PASS_FILTER_OPERATION;
   }
 
-  if (quad->filters_scale != gfx::Vector2dF(1, 1)) {
-    for (const FilterOperation& operation : quad->filters.operations()) {
-      if (operation.type() == FilterOperation::BLUR ||
-          operation.type() == FilterOperation::DROP_SHADOW) {
-        return CA_LAYER_FAILED_RENDER_PASS_FILTER_SCALE;
-      }
-    }
-  }
-
+  ca_layer_overlay->rpdq = quad;
   ca_layer_overlay->contents_rect = gfx::RectF(0, 0, 1, 1);
 
   // TODO(erikchen): Enable this when RenderPassDrawQuad promotion to CALayer