[base] Move hashmap allocator to a field

src/ast/scopes.cc

 // 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.
 
 #include "src/ast/scopes.h"
 
 #include <set>
 
 #include "src/accessors.h"
 #include "src/ast/ast.h"
@@ skipping 18 matching lines @@
 
 Variable* VariableMap::Declare(Zone* zone, Scope* scope,
                                const AstRawString* name, VariableMode mode,
                                VariableKind kind,
                                InitializationFlag initialization_flag,
                                MaybeAssignedFlag maybe_assigned_flag,
                                bool* added) {
   // AstRawStrings are unambiguous, i.e., the same string is always represented
   // by the same AstRawString*.
   // FIXME(marja): fix the type of Lookup.
-  Entry* p =
-      ZoneHashMap::LookupOrInsert(const_cast<AstRawString*>(name), name->hash(),
-                                  ZoneAllocationPolicy(zone));
+  Entry* p = ZoneHashMap::LookupOrInsert(const_cast<AstRawString*>(name),
+                                         name->hash());
   if (added) *added = p->value == nullptr;
   if (p->value == nullptr) {
     // The variable has not been declared yet -> insert it.
     DCHECK_EQ(name, p->key);
     p->value = new (zone) Variable(scope, name, mode, kind, initialization_flag,
                                    maybe_assigned_flag);
   }
   return reinterpret_cast<Variable*>(p->value);
 }
 
 void VariableMap::Remove(Variable* var) {
   const AstRawString* name = var->raw_name();
   ZoneHashMap::Remove(const_cast<AstRawString*>(name), name->hash());
 }
 
 void VariableMap::Add(Zone* zone, Variable* var) {
   const AstRawString* name = var->raw_name();
-  Entry* p =
-      ZoneHashMap::LookupOrInsert(const_cast<AstRawString*>(name), name->hash(),
-                                  ZoneAllocationPolicy(zone));
+  Entry* p = ZoneHashMap::LookupOrInsert(const_cast<AstRawString*>(name),
+                                         name->hash());
   DCHECK_NULL(p->value);
   DCHECK_EQ(name, p->key);
   p->value = var;
 }
 
 Variable* VariableMap::Lookup(const AstRawString* name) {
   Entry* p = ZoneHashMap::Lookup(const_cast<AstRawString*>(name), name->hash());
   if (p != NULL) {
     DCHECK(reinterpret_cast<const AstRawString*>(p->key) == name);
     DCHECK(p->value != NULL);
     return reinterpret_cast<Variable*>(p->value);
   }
   return NULL;
 }
 
 SloppyBlockFunctionMap::SloppyBlockFunctionMap(Zone* zone)
     : ZoneHashMap(ZoneHashMap::PointersMatch, 8, ZoneAllocationPolicy(zone)) {}
 
 void SloppyBlockFunctionMap::Declare(Zone* zone, const AstRawString* name,
                                      SloppyBlockFunctionStatement* stmt) {
   // AstRawStrings are unambiguous, i.e., the same string is always represented
   // by the same AstRawString*.
-  Entry* p =
-      ZoneHashMap::LookupOrInsert(const_cast<AstRawString*>(name), name->hash(),
-                                  ZoneAllocationPolicy(zone));
+  Entry* p = ZoneHashMap::LookupOrInsert(const_cast<AstRawString*>(name),
+                                         name->hash());
   stmt->set_next(static_cast<SloppyBlockFunctionStatement*>(p->value));
   p->value = stmt;
 }
 
 
 // ----------------------------------------------------------------------------
 // Implementation of Scope
 
 Scope::Scope(Zone* zone)
     : zone_(zone),
@@ skipping 1714 matching lines @@
   Variable* function =
       is_function_scope() ? AsDeclarationScope()->function_var() : nullptr;
   bool is_function_var_in_context =
       function != nullptr && function->IsContextSlot();
   return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
          (is_function_var_in_context ? 1 : 0);
 }
 
 }  // namespace internal
 }  // namespace v8