[crankshaft] Remove adventurous operator< for Handle<Map>.

src/lithium.cc

Index: src/lithium.cc
diff --git a/src/lithium.cc b/src/lithium.cc
index 0bebfaa96e9ae4d87339ab7a0fb6571acf190183..a9d7748ef3883c3677ce6aa3ec5f3b0832a0c72a 100644
--- a/src/lithium.cc
+++ b/src/lithium.cc
@@ -273,8 +273,8 @@ LChunk::LChunk(CompilationInfo* info, HGraph* graph)
       instructions_(32, info->zone()),
       pointer_maps_(8, info->zone()),
       inlined_functions_(1, info->zone()),
-      deprecation_dependencies_(MapLess(), MapAllocator(info->zone())),
-      stability_dependencies_(MapLess(), MapAllocator(info->zone())) {}
+      deprecation_dependencies_(32, info->zone()),
+      stability_dependencies_(8, info->zone()) {}
 
 
 LLabel* LChunk::GetLabel(int block_id) const {
@@ -464,17 +464,13 @@ void LChunk::CommitDependencies(Handle<Code> code) const {
   if (!code->is_optimized_code()) return;
   HandleScope scope(isolate());
 
-  for (MapSet::const_iterator it = deprecation_dependencies_.begin(),
-       iend = deprecation_dependencies_.end(); it != iend; ++it) {
-    Handle<Map> map = *it;
+  for (Handle<Map> map : deprecation_dependencies_) {
     DCHECK(!map->is_deprecated());
     DCHECK(map->CanBeDeprecated());
     Map::AddDependentCode(map, DependentCode::kTransitionGroup, code);
   }
 
-  for (MapSet::const_iterator it = stability_dependencies_.begin(),
-       iend = stability_dependencies_.end(); it != iend; ++it) {
-    Handle<Map> map = *it;
+  for (Handle<Map> map : stability_dependencies_) {
     DCHECK(map->is_stable());
     DCHECK(map->CanTransition());
     Map::AddDependentCode(map, DependentCode::kPrototypeCheckGroup, code);