[crankshaft] Always force number representation for increment.

src/crankshaft/hydrogen.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_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
@@ skipping 2669 matching lines @@
       BailoutId bailout_id);
 
   HInstruction* BuildStringCharCodeAt(HValue* string,
                                       HValue* index);
 
   HValue* BuildBinaryOperation(
       BinaryOperation* expr,
       HValue* left,
       HValue* right,
       PushBeforeSimulateBehavior push_sim_result);
-  HInstruction* BuildIncrement(bool returns_original_input,
-                               CountOperation* expr);
+  HInstruction* BuildIncrement(CountOperation* expr);
   HInstruction* BuildKeyedGeneric(PropertyAccessType access_type,
                                   Expression* expr, FeedbackVectorSlot slot,
                                   HValue* object, HValue* key, HValue* value);
 
   HInstruction* TryBuildConsolidatedElementLoad(HValue* object,
                                                 HValue* key,
                                                 HValue* val,
                                                 SmallMapList* maps);
 
   LoadKeyedHoleMode BuildKeyedHoleMode(Handle<Map> map);
@@ skipping 308 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_