Split TemplateHashMapImpl::Lookup into two methods

src/snapshot/serialize.h

 // Copyright 2012 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_SERIALIZE_H_
 #define V8_SERIALIZE_H_
 
 #include "src/hashmap.h"
 #include "src/heap-profiler.h"
 #include "src/isolate.h"
@@ skipping 63 matching lines @@
   static void SetValue(HashMap::Entry* entry, uint32_t v) {
     entry->value = reinterpret_cast<void*>(v);
   }
 
   static uint32_t GetValue(HashMap::Entry* entry) {
     return static_cast<uint32_t>(reinterpret_cast<intptr_t>(entry->value));
   }
 
   inline static HashMap::Entry* LookupEntry(HashMap* map, HeapObject* obj,
                                             bool insert) {
-    return map->Lookup(Key(obj), Hash(obj), insert);
+    if (insert) {
+      map->LookupOrInsert(Key(obj), Hash(obj));
+    }
+    return map->Lookup(Key(obj), Hash(obj));
   }
 
  private:
   static uint32_t Hash(HeapObject* obj) {
     return static_cast<int32_t>(reinterpret_cast<intptr_t>(obj->address()));
   }
 
   static void* Key(HeapObject* obj) {
     return reinterpret_cast<void*>(obj->address());
   }
@@ skipping 876 matching lines @@
       kNumInternalizedStringsOffset + kInt32Size;
   static const int kNumCodeStubKeysOffset = kNumReservationsOffset + kInt32Size;
   static const int kPayloadLengthOffset = kNumCodeStubKeysOffset + kInt32Size;
   static const int kChecksum1Offset = kPayloadLengthOffset + kInt32Size;
   static const int kChecksum2Offset = kChecksum1Offset + kInt32Size;
   static const int kHeaderSize = kChecksum2Offset + kInt32Size;
 };
 } }  // namespace v8::internal
 
 #endif  // V8_SERIALIZE_H_