Move Partition Allocator into Chromium base.

third_party/WebKit/Source/wtf/HashCountedSet.h

Index: third_party/WebKit/Source/wtf/HashCountedSet.h
diff --git a/third_party/WebKit/Source/wtf/HashCountedSet.h b/third_party/WebKit/Source/wtf/HashCountedSet.h
index fc60257d7e8ec265aed82e8e203bc9a9cff0ec14..5b2c9b0fee1d2e67e9edbb2d5f6abebc9e95d448 100644
--- a/third_party/WebKit/Source/wtf/HashCountedSet.h
+++ b/third_party/WebKit/Source/wtf/HashCountedSet.h
@@ -21,6 +21,7 @@
 #ifndef WTF_HashCountedSet_h
 #define WTF_HashCountedSet_h
 
+#include "base/allocator/partition_allocator/partition_allocator.h"
 #include "wtf/Assertions.h"
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
@@ -33,9 +34,9 @@ namespace WTF {
 template <typename Value,
           typename HashFunctions = typename DefaultHash<Value>::Hash,
           typename Traits = HashTraits<Value>,
-          typename Allocator = PartitionAllocator>
+          typename Allocator = base::PartitionAllocator>
 class HashCountedSet {
-  WTF_USE_ALLOCATOR(HashCountedSet, Allocator);
+  USE_ALLOCATOR(HashCountedSet, Allocator);
   WTF_MAKE_NONCOPYABLE(HashCountedSet);
 
  private: