Split TemplateHashMapImpl::Lookup into two methods

src/allocation-tracker.cc

 // Copyright 2013 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.
 
 #include "src/v8.h"
 
 #include "src/allocation-tracker.h"
 #include "src/frames-inl.h"
 #include "src/heap-snapshot-generator.h"
 
@@ skipping 244 matching lines @@
 
 
 static uint32_t SnapshotObjectIdHash(SnapshotObjectId id) {
   return ComputeIntegerHash(static_cast<uint32_t>(id),
                             v8::internal::kZeroHashSeed);
 }
 
 
 unsigned AllocationTracker::AddFunctionInfo(SharedFunctionInfo* shared,
                                             SnapshotObjectId id) {
-  HashMap::Entry* entry = id_to_function_info_index_.Lookup(
-      reinterpret_cast<void*>(id), SnapshotObjectIdHash(id), true);
+  HashMap::Entry* entry = id_to_function_info_index_.LookupOrInsert(
+      reinterpret_cast<void*>(id), SnapshotObjectIdHash(id));
   if (entry->value == NULL) {
     FunctionInfo* info = new FunctionInfo();
     info->name = names_->GetFunctionName(shared->DebugName());
     info->function_id = id;
     if (shared->script()->IsScript()) {
       Script* script = Script::cast(shared->script());
       if (script->name()->IsName()) {
         Name* name = Name::cast(script->name());
         info->script_name = names_->GetName(name);
       }
@@ skipping 54 matching lines @@
 void AllocationTracker::UnresolvedLocation::HandleWeakScript(
     const v8::WeakCallbackData<v8::Value, void>& data) {
   UnresolvedLocation* loc =
       reinterpret_cast<UnresolvedLocation*>(data.GetParameter());
   GlobalHandles::Destroy(reinterpret_cast<Object**>(loc->script_.location()));
   loc->script_ = Handle<Script>::null();
 }
 
 
 } }  // namespace v8::internal