Split TemplateHashMapImpl::Lookup into two methods

src/gdb-jit.cc

 // Copyright 2010 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/base/bits.h"
 #include "src/base/platform/platform.h"
 #include "src/bootstrapper.h"
 #include "src/compiler.h"
@@ skipping 1954 matching lines @@
 
 static HashMap* GetLineMap() {
   static HashMap* line_map = NULL;
   if (line_map == NULL) line_map = new HashMap(&HashMap::PointersMatch);
   return line_map;
 }
 
 
 static void PutLineInfo(Address addr, LineInfo* info) {
   HashMap* line_map = GetLineMap();
-  HashMap::Entry* e = line_map->Lookup(addr, HashCodeAddress(addr), true);
+  HashMap::Entry* e = line_map->LookupOrInsert(addr, HashCodeAddress(addr));
   if (e->value != NULL) delete static_cast<LineInfo*>(e->value);
   e->value = info;
 }
 
 
 static LineInfo* GetLineInfo(Address addr) {
   void* value = GetLineMap()->Remove(addr, HashCodeAddress(addr));
   return static_cast<LineInfo*>(value);
 }
 
@@ skipping 173 matching lines @@
       LineInfo* line_info = reinterpret_cast<LineInfo*>(event->user_data);
       PutLineInfo(reinterpret_cast<Address>(event->code_start), line_info);
       break;
     }
   }
 }
 #endif
 }  // namespace GDBJITInterface
 }  // namespace internal
 }  // namespace v8