Move hashmap into base/.

src/snapshot/partial-serializer.h

 // Copyright 2016 the V8 project 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 V8_SNAPSHOT_PARTIAL_SERIALIZER_H_
 #define V8_SNAPSHOT_PARTIAL_SERIALIZER_H_
 
 #include "src/address-map.h"
 #include "src/snapshot/serializer.h"
 
 namespace v8 {
 namespace internal {
 
 class PartialSerializer : public Serializer {
  public:
   PartialSerializer(Isolate* isolate, Serializer* startup_snapshot_serializer,
                     SnapshotByteSink* sink);
 
   ~PartialSerializer() override;
 
   // Serialize the objects reachable from a single object pointer.
   void Serialize(Object** o);
 
  private:
   class PartialCacheIndexMap : public AddressMapBase {
    public:
-    PartialCacheIndexMap() : map_(HashMap::PointersMatch) {}
+    PartialCacheIndexMap() : map_(base::HashMap::PointersMatch) {}
 
     static const int kInvalidIndex = -1;
 
     // Lookup object in the map. Return its index if found, or create
     // a new entry with new_index as value, and return kInvalidIndex.
     int LookupOrInsert(HeapObject* obj, int new_index) {
-      HashMap::Entry* entry = LookupEntry(&map_, obj, false);
+      base::HashMap::Entry* entry = LookupEntry(&map_, obj, false);
       if (entry != NULL) return GetValue(entry);
       SetValue(LookupEntry(&map_, obj, true), static_cast<uint32_t>(new_index));
       return kInvalidIndex;
     }
 
    private:
-    HashMap map_;
+    base::HashMap map_;
 
     DISALLOW_COPY_AND_ASSIGN(PartialCacheIndexMap);
   };
 
   void SerializeObject(HeapObject* o, HowToCode how_to_code,
                        WhereToPoint where_to_point, int skip) override;
 
   int PartialSnapshotCacheIndex(HeapObject* o);
   bool ShouldBeInThePartialSnapshotCache(HeapObject* o);
 
   Serializer* startup_serializer_;
   PartialCacheIndexMap partial_cache_index_map_;
   int next_partial_cache_index_;
   DISALLOW_COPY_AND_ASSIGN(PartialSerializer);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_PARTIAL_SERIALIZER_H_