Remove Scope::scope_uses_this_ flag

src/scopes.h

Index: src/scopes.h
diff --git a/src/scopes.h b/src/scopes.h
index 92f5c4cf72e73aff6bbdf5e09914de835d535f45..f3c64f9eadf73c7c4f9c1671779c4f55926697f9 100644
--- a/src/scopes.h
+++ b/src/scopes.h
@@ -218,9 +218,6 @@ class Scope: public ZoneObject {
   // Inform the scope that the corresponding code uses "super".
   void RecordSuperPropertyUsage() { scope_uses_super_property_ = true; }
 
-  // Inform the scope that the corresponding code uses "this".
-  void RecordThisUsage() { scope_uses_this_ = true; }
-
   // Set the language mode flag (unless disabled by a global flag).
   void SetLanguageMode(LanguageMode language_mode) {
     language_mode_ = language_mode;
@@ -324,10 +321,6 @@ class Scope: public ZoneObject {
   bool inner_uses_super_property() const {
     return inner_scope_uses_super_property_;
   }
-  // Does this scope access "this".
-  bool uses_this() const { return scope_uses_this_; }
-  // Does any inner scope access "this".
-  bool inner_uses_this() const { return inner_scope_uses_this_; }
 
   const Scope* NearestOuterEvalScope() const {
     if (is_eval_scope()) return this;
@@ -592,8 +585,6 @@ class Scope: public ZoneObject {
   bool scope_uses_arguments_;
   // This scope uses "super" property ('super.foo').
   bool scope_uses_super_property_;
-  // This scope uses "this".
-  bool scope_uses_this_;
   // This scope contains an "use asm" annotation.
   bool asm_module_;
   // This scope's outer context is an asm module.
@@ -609,7 +600,6 @@ class Scope: public ZoneObject {
   bool inner_scope_calls_eval_;
   bool inner_scope_uses_arguments_;
   bool inner_scope_uses_super_property_;
-  bool inner_scope_uses_this_;
   bool force_eager_compilation_;
   bool force_context_allocation_;