Thread/Isolate refactoring: new(Isolate) -> new(Zone)

runtime/vm/flow_graph_range_analysis.h

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_FLOW_GRAPH_RANGE_ANALYSIS_H_
 #define VM_FLOW_GRAPH_RANGE_ANALYSIS_H_
 
 #include "vm/flow_graph.h"
 #include "vm/intermediate_language.h"
 
@@ skipping 583 matching lines @@
   void NarrowMintToInt32();
 
   void DiscoverSimpleInductionVariables();
 
   // Remove artificial Constraint instructions and replace them with actual
   // unconstrained definitions.
   void RemoveConstraints();
 
   Range* ConstraintSmiRange(Token::Kind op, Definition* boundary);
 
-  Isolate* isolate() const { return flow_graph_->isolate(); }
+  Zone* zone() const { return flow_graph_->zone(); }
 
   FlowGraph* flow_graph_;
 
   // Range object representing full Smi range.
   Range smi_range_;
 
   Range int64_range_;
 
   // Value that are known to be smi or mint.
   GrowableArray<Definition*> values_;
@@ skipping 29 matching lines @@
   bool IsPotentialUint32Definition(Definition* def);
   void FindPotentialUint32Definitions();
   bool IsUint32NarrowingDefinition(Definition* def);
   void FindUint32NarrowingDefinitions();
   bool AllUsesAreUint32Narrowing(Value* list_head);
   bool CanBecomeUint32(Definition* def);
   void Propagate();
   Definition* ConstructReplacementFor(Definition* def);
   void ReplaceInstructions();
 
-  Isolate* isolate() const { return isolate_; }
+  Zone* zone() const { return zone_; }
 
   GrowableArray<Definition*> potential_uint32_defs_;
   BitVector* selected_uint32_defs_;
 
   FlowGraph* flow_graph_;
-  Isolate* isolate_;
+  Zone* zone_;
 };
 
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_RANGE_ANALYSIS_H_