Fix reintroduction of global variables that have been deleted.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index a5066c6754e754b5e6bbeb07ed522805f0fce97c..572570ef29587777c8b74c18ea3596779cd896e6 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1645,7 +1645,8 @@ LInstruction* LChunkBuilder::DoLoadGlobal(HLoadGlobal* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreGlobal(HStoreGlobal* instr) {
-  return new LStoreGlobal(UseRegisterAtStart(instr->value()));
+  LStoreGlobal* result = new LStoreGlobal(UseRegisterAtStart(instr->value()));
+  return AssignEnvironment(result);
 }