cc: More consistent reasoning about display list memory usage.

cc/base/list_container.cc

Index: cc/base/list_container.cc
diff --git a/cc/base/list_container.cc b/cc/base/list_container.cc
index 1d54a6d038fdb8eebe6a272c16438192316c5cd4..d5cb4f032605656d43ad072866ce27b3cacd6172 100644
--- a/cc/base/list_container.cc
+++ b/cc/base/list_container.cc
@@ -120,10 +120,8 @@ class ListContainerBase::ListContainerCharAllocator {
 
   size_t Capacity() const {
     size_t capacity_sum = 0;
-    for (ScopedPtrVector<InnerList>::const_iterator iter = storage_.begin();
-         iter != storage_.end(); ++iter) {
-      capacity_sum += (*iter)->capacity;
-    }
+    for (const auto& inner_list : storage_)
+      capacity_sum += inner_list->capacity;
     return capacity_sum;
   }
 
@@ -425,6 +423,10 @@ size_t ListContainerBase::MaxSizeForDerivedClass() const {
   return data_->element_size();
 }
 
+size_t ListContainerBase::GetCapacityInBytes() const {
+  return data_->Capacity() * data_->element_size();
+}
+
 void ListContainerBase::clear() {
   data_->Clear();
 }