Move hashmap into base/.

src/parsing/scanner.cc

Index: src/parsing/scanner.cc
diff --git a/src/parsing/scanner.cc b/src/parsing/scanner.cc
index 6a9b32e63461f3b12e334546d8b94db6c48d49d7..8915e8a9e4dfd611b8b4656ea7b857ccec3fe9fd 100644
--- a/src/parsing/scanner.cc
+++ b/src/parsing/scanner.cc
@@ -1590,7 +1590,7 @@ int DuplicateFinder::AddSymbol(Vector<const uint8_t> key,
                                int value) {
   uint32_t hash = Hash(key, is_one_byte);
   byte* encoding = BackupKey(key, is_one_byte);
-  HashMap::Entry* entry = map_.LookupOrInsert(encoding, hash);
+  base::HashMap::Entry* entry = map_.LookupOrInsert(encoding, hash);
   int old_value = static_cast<int>(reinterpret_cast<intptr_t>(entry->value));
   entry->value =
     reinterpret_cast<void*>(static_cast<intptr_t>(value | old_value));