Remove Scope::scope_uses_this_ flag

src/scopes.cc

Index: src/scopes.cc
diff --git a/src/scopes.cc b/src/scopes.cc
index a2d2ccf5a5dca654b6f7cc76626ebdb19e932556..0dec5b0ede6c6d4dfd9101988a6796d4d432c888 100644
--- a/src/scopes.cc
+++ b/src/scopes.cc
@@ -165,7 +165,6 @@ void Scope::SetDefaults(ScopeType scope_type, Scope* outer_scope,
   scope_calls_eval_ = false;
   scope_uses_arguments_ = false;
   scope_uses_super_property_ = false;
-  scope_uses_this_ = false;
   asm_module_ = false;
   asm_function_ = outer_scope != NULL && outer_scope->asm_module_;
   // Inherit the language mode from the parent scope.
@@ -173,7 +172,6 @@ void Scope::SetDefaults(ScopeType scope_type, Scope* outer_scope,
   outer_scope_calls_sloppy_eval_ = false;
   inner_scope_calls_eval_ = false;
   inner_scope_uses_arguments_ = false;
-  inner_scope_uses_this_ = false;
   inner_scope_uses_super_property_ = false;
   force_eager_compilation_ = false;
   force_context_allocation_ = (outer_scope != NULL && !is_function_scope())
@@ -371,7 +369,6 @@ Scope* Scope::FinalizeBlockScope() {
   // Propagate usage flags to outer scope.
   if (uses_arguments()) outer_scope_->RecordArgumentsUsage();
   if (uses_super_property()) outer_scope_->RecordSuperPropertyUsage();
-  if (uses_this()) outer_scope_->RecordThisUsage();
   if (scope_calls_eval_) outer_scope_->RecordEvalCall();
 
   return NULL;
@@ -921,13 +918,11 @@ void Scope::Print(int n) {
   if (scope_uses_arguments_) Indent(n1, "// scope uses 'arguments'\n");
   if (scope_uses_super_property_)
     Indent(n1, "// scope uses 'super' property\n");
-  if (scope_uses_this_) Indent(n1, "// scope uses 'this'\n");
   if (inner_scope_uses_arguments_) {
     Indent(n1, "// inner scope uses 'arguments'\n");
   }
   if (inner_scope_uses_super_property_)
     Indent(n1, "// inner scope uses 'super' property\n");
-  if (inner_scope_uses_this_) Indent(n1, "// inner scope uses 'this'\n");
   if (outer_scope_calls_sloppy_eval_) {
     Indent(n1, "// outer scope calls 'eval' in sloppy context\n");
   }
@@ -1287,9 +1282,6 @@ void Scope::PropagateScopeInfo(bool outer_scope_calls_sloppy_eval ) {
           inner->inner_scope_uses_super_property_) {
         inner_scope_uses_super_property_ = true;
       }
-      if (inner->scope_uses_this_ || inner->inner_scope_uses_this_) {
-        inner_scope_uses_this_ = true;
-      }
     }
     if (inner->force_eager_compilation_) {
       force_eager_compilation_ = true;