Remove some unnecessary binding initialization checks.

src/arm/full-codegen-arm.cc

Index: src/arm/full-codegen-arm.cc
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 04c4262a83d48fd0791a7f6fa57590020d6b3253..c49b26f45ead9cc877824aa47cfe1461a9828c38 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -721,8 +721,8 @@ void FullCodeGenerator::EmitDeclaration(VariableProxy* proxy,
   // need to "declare" it at runtime to make sure it actually exists in the
   // local context.
   Variable* variable = proxy->var();
-  bool binding_needs_init =
-      mode == CONST || mode == CONST_HARMONY || mode == LET;
+  bool binding_needs_init = (function == NULL) &&
+      (mode == CONST || mode == CONST_HARMONY || mode == LET);
   switch (variable->location()) {
     case Variable::UNALLOCATED:
       ++(*global_count);