Configurable vector capacity in blink::DistributedNodes

Source/core/dom/shadow/ElementShadow.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 67 matching lines @@
         } else {
             m_nodes.append(child);
         }
     }
     m_distributed.resize(m_nodes.size());
     m_distributed.fill(false);
 }
 
 void DistributionPool::distributeTo(InsertionPoint* insertionPoint, ElementShadow* elementShadow)
 {
-    DistributedNodes distributedNodes;
+    DistributedNodes distributedNodes(m_nodes.size());
 
     for (size_t i = 0; i < m_nodes.size(); ++i) {
         if (m_distributed[i])
             continue;
 
         if (isHTMLContentElement(*insertionPoint) && !toHTMLContentElement(insertionPoint)->canSelectNode(m_nodes, i))
             continue;
 
         Node* node = m_nodes[i];
         distributedNodes.append(node);
@@ skipping 284 matching lines @@
     visitor->trace(m_nodeToInsertionPoints);
     visitor->trace(m_selectFeatures);
     // Shadow roots are linked with previous and next pointers which are traced.
     // It is therefore enough to trace one of the shadow roots here and the
     // rest will be traced from there.
     visitor->trace(m_shadowRoots.head());
 #endif
 }
 
 } // namespace