SPv2: Limit compositor element id application to a single layer.

third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/graphics/compositing/PaintArtifactCompositor.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include "cc/layers/content_layer_client.h"
@@ skipping 626 matching lines @@
     const auto* transform = pending_layer.property_tree_state.Transform();
     int transform_id =
         property_tree_manager.EnsureCompositorTransformNode(transform);
     int clip_id = property_tree_manager.EnsureCompositorClipNode(
         pending_layer.property_tree_state.Clip());
     int effect_id = property_tree_manager.SwitchToEffectNode(
         *pending_layer.property_tree_state.Effect());
 
     layer->set_offset_to_transform_parent(layer_offset);
     CompositorElementId element_id =
-        pending_layer.property_tree_state.GetCompositorElementId();
+        pending_layer.property_tree_state.GetCompositorElementId(
+            composited_element_ids);
     if (element_id) {
       layer->SetElementId(element_id);
       composited_element_ids.insert(element_id);
     }
 
     root_layer_->AddChild(layer);
     layer->set_property_tree_sequence_number(g_s_property_tree_sequence_number);
     layer->SetTransformTreeIndex(transform_id);
     layer->SetClipTreeIndex(clip_id);
     layer->SetEffectTreeIndex(effect_id);
@@ skipping 19 matching lines @@
 #ifndef NDEBUG
 void PaintArtifactCompositor::ShowDebugData() {
   LOG(ERROR) << LayersAsJSON(kLayerTreeIncludesDebugInfo)
                     ->ToPrettyJSONString()
                     .Utf8()
                     .Data();
 }
 #endif
 
 }  // namespace blink