Replace CollectVariables with locals(), update callsites to walk locals instead

src/ast/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
 #include "src/ast/variables.h"
@@ skipping 1772 matching lines @@
     return nullptr;
   }
 
   bool IsMonomorphic() const {
     if (expression()->IsProperty()) {
       return expression()->AsProperty()->IsMonomorphic();
     }
     return !target_.is_null();
   }
 
-  bool global_call() const {
-    VariableProxy* proxy = expression_->AsVariableProxy();
-    return proxy != NULL && proxy->var()->IsUnallocatedOrGlobalSlot();
-  }
-
-  bool known_global_function() const {
-    return global_call() && !target_.is_null();
-  }
-
   Handle<JSFunction> target() { return target_; }
 
   Handle<AllocationSite> allocation_site() { return allocation_site_; }
 
   void SetKnownGlobalTarget(Handle<JSFunction> target) {
     target_ = target;
     set_is_uninitialized(false);
   }
   void set_target(Handle<JSFunction> target) { target_ = target; }
   void set_allocation_site(Handle<AllocationSite> site) {
@@ skipping 1639 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_