Implement DrawQuad StructTraits

cc/base/list_container.h

 // Copyright 2014 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.
 
 #ifndef CC_BASE_LIST_CONTAINER_H_
 #define CC_BASE_LIST_CONTAINER_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 126 matching lines @@
   Iterator InsertBeforeAndInvalidateAllPointers(Iterator at, size_t count) {
     helper_.InsertBeforeAndInvalidateAllPointers(&at, count);
     Iterator result = at;
     for (size_t i = 0; i < count; ++i) {
       new (at.item_iterator) DerivedElementType();
       ++at;
     }
     return result;
   }
 
+  ListContainer& operator=(ListContainer&& other) {

[dcheng, 2016/06/16 20:57:41]

Even if you don't need it now, it's better form to define both a move
constructor *and* move assignment operator.

[Fady Samuel, 2016/06/16 22:56:29]

Agreed. Done. 

+    helper_.data_.swap(other.helper_.data_);
+    return *this;
+  }
+
   template <typename DerivedElementType>
   void swap(ListContainer<DerivedElementType>& other) {
     helper_.data_.swap(other.helper_.data_);
   }
 
   // Appends a new item without copying. The original item will not be
   // destructed and will be replaced with a new DerivedElementType. The
   // DerivedElementType does not have to match the moved type as a full block
   // of memory will be moved (up to MaxSizeForDerivedClass()). A pointer to
   // the moved element is returned.
@@ skipping 181 matching lines @@
 
  private:
   ListContainerHelper helper_;
 
   DISALLOW_COPY_AND_ASSIGN(ListContainer);
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_LIST_CONTAINER_H_