Factor out HSimulate::ReplayEnvironment.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 7c02a62c46f5ae21842edf1e6033d84afeaa5dd1..4b46822498dc3474ceadb811be6464fb90de78bf 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -2485,19 +2485,7 @@ LInstruction* LChunkBuilder::DoIsConstructCallAndBranch(
 
 LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
   HEnvironment* env = current_block_->last_environment();
-  ASSERT(env != NULL);
-
-  env->set_ast_id(instr->ast_id());
-
-  env->Drop(instr->pop_count());
-  for (int i = instr->values()->length() - 1; i >= 0; --i) {
-    HValue* value = instr->values()->at(i);
-    if (instr->HasAssignedIndexAt(i)) {
-      env->Bind(instr->GetAssignedIndexAt(i), value);
-    } else {
-      env->Push(value);
-    }
-  }
+  instr->ReplayEnvironment(env);
 
   // If there is an instruction pending deoptimization environment create a
   // lazy bailout instruction to capture the environment.