Split TemplateHashMapImpl::Lookup into two methods

src/heap/spaces.cc

Index: src/heap/spaces.cc
diff --git a/src/heap/spaces.cc b/src/heap/spaces.cc
index 18d1b50cf2c47ac02f2aa884f96b10a9895427a2..e651e0dcb75aa1d1ac2401a9113eb983b816e4d2 100644
--- a/src/heap/spaces.cc
+++ b/src/heap/spaces.cc
@@ -2902,8 +2902,8 @@ AllocationResult LargeObjectSpace::AllocateRaw(int object_size,
   uintptr_t base = reinterpret_cast<uintptr_t>(page) / MemoryChunk::kAlignment;
   uintptr_t limit = base + (page->size() - 1) / MemoryChunk::kAlignment;
   for (uintptr_t key = base; key <= limit; key++) {
-    HashMap::Entry* entry = chunk_map_.Lookup(reinterpret_cast<void*>(key),
-                                              static_cast<uint32_t>(key), true);
+    HashMap::Entry* entry = chunk_map_.LookupOrInsert(
+        reinterpret_cast<void*>(key), static_cast<uint32_t>(key));
     DCHECK(entry != NULL);
     entry->value = page;
   }
@@ -2950,7 +2950,7 @@ Object* LargeObjectSpace::FindObject(Address a) {
 LargePage* LargeObjectSpace::FindPage(Address a) {
   uintptr_t key = reinterpret_cast<uintptr_t>(a) / MemoryChunk::kAlignment;
   HashMap::Entry* e = chunk_map_.Lookup(reinterpret_cast<void*>(key),
-                                        static_cast<uint32_t>(key), false);
+                                        static_cast<uint32_t>(key));
   if (e != NULL) {
     DCHECK(e->value != NULL);
     LargePage* page = reinterpret_cast<LargePage*>(e->value);