[scheduler] Fix --disable-background-timer-throttling flag.

third_party/WebKit/Source/platform/wtf/Deque.h

 /*
  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 15 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WTF_Deque_h
 #define WTF_Deque_h
 
 // FIXME: Could move what Vector and Deque share into a separate file.
 // Deque doesn't actually use Vector.
 
+#include <iterator>
+#include "platform/wtf/Allocator.h"
 #include "platform/wtf/Vector.h"
-#include <iterator>
 
 namespace WTF {
 
 template <typename T, size_t inlineCapacity, typename Allocator>
 class DequeIteratorBase;
 template <typename T, size_t inlineCapacity, typename Allocator>
 class DequeIterator;
 template <typename T, size_t inlineCapacity, typename Allocator>
 class DequeConstIterator;
 
@@ skipping 648 matching lines @@
 inline void swap(Deque<T, inlineCapacity, Allocator>& a,
                  Deque<T, inlineCapacity, Allocator>& b) {
   a.Swap(b);
 }
 
 }  // namespace WTF
 
 using WTF::Deque;
 
 #endif  // WTF_Deque_h