cc: More consistent reasoning about display list memory usage.

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 "base/logging.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 145 matching lines @@
   Iterator end();
 
   Iterator IteratorAt(size_t index);
   ConstIterator IteratorAt(size_t index) const;
 
   size_t size() const;
   bool empty() const;
 
   size_t MaxSizeForDerivedClass() const;
 
+  size_t GetCapacityInBytes() const;
+
   // Unlike the ListContainer method, this one does not invoke element
   // destructors.
   void clear();
 
   size_t AvailableSizeWithoutAnotherAllocationForTesting() const;
 
   // Hands out memory location for an element at the end of data structure.
   void* Allocate(size_t size_of_actual_element_in_bytes);
 
   scoped_ptr<ListContainerCharAllocator> data_;
@@ skipping 127 matching lines @@
     size_t max_size_for_derived_class = MaxSizeForDerivedClass();
     void* new_item = Allocate(max_size_for_derived_class);
     memcpy(new_item, static_cast<void*>(item), max_size_for_derived_class);
     // Construct a new element in-place so it can be destructed safely.
     new (item) DerivedElementType;
     return static_cast<DerivedElementType*>(new_item);
   }
 
   using ListContainerBase::size;
   using ListContainerBase::empty;
+  using ListContainerBase::GetCapacityInBytes;
 
   void clear() {
     for (Iterator i = begin(); i != end(); ++i) {
       i->~BaseElementType();
     }
     ListContainerBase::clear();
   }
 
   using ListContainerBase::AvailableSizeWithoutAnotherAllocationForTesting;
 
@@ skipping 148 matching lines @@
         ListContainerBase::ConstReverseIterator base_iterator)
         : ListContainerBase::ConstReverseIterator(base_iterator) {}
     friend ConstReverseIterator ListContainer<BaseElementType>::crbegin() const;
     friend ConstReverseIterator ListContainer<BaseElementType>::crend() const;
   };
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_LIST_CONTAINER_H_