MIPS: Split TemplateHashMapImpl::Lookup into two methods.

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index 6a34cb365106a5ac618b3dfa5e8196ec136c2381..d2493d418f4970e8cfa8988c3264b1f011cbd3c7 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -889,9 +889,8 @@ void Simulator::FlushICache(v8::internal::HashMap* i_cache,
 
 
 CachePage* Simulator::GetCachePage(v8::internal::HashMap* i_cache, void* page) {
-  v8::internal::HashMap::Entry* entry = i_cache->Lookup(page,
-                                                        ICacheHash(page),
-                                                        true);
+  v8::internal::HashMap::Entry* entry =
+      i_cache->LookupOrInsert(page, ICacheHash(page));
   if (entry->value == NULL) {
     CachePage* new_page = new CachePage();
     entry->value = new_page;