Allow specifying base offset when constructing Keyed hydrogen instructions

src/arm/lithium-codegen-arm.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_ARM_LITHIUM_CODEGEN_ARM_H_
 #define V8_ARM_LITHIUM_CODEGEN_ARM_H_
 
 #include "arm/lithium-arm.h"
 
 #include "arm/lithium-gap-resolver-arm.h"
@@ skipping 115 matching lines @@
   // Parallel move support.
   void DoParallelMove(LParallelMove* move);
   void DoGap(LGap* instr);
 
   MemOperand PrepareKeyedOperand(Register key,
                                  Register base,
                                  bool key_is_constant,
                                  int constant_key,
                                  int element_size,
                                  int shift_size,
-                                 int additional_index,
-                                 int additional_offset);
+                                 int base_offset);
 
   // Emit frame translation commands for an environment.
   void WriteTranslation(LEnvironment* environment, Translation* translation);
 
   // Declare methods that deal with the individual node types.
 #define DECLARE_DO(type) void Do##type(L##type* node);
   LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO)
 #undef DECLARE_DO
 
  private:
@@ skipping 281 matching lines @@
   LCodeGen* codegen_;
   Label entry_;
   Label exit_;
   Label* external_exit_;
   int instruction_index_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_LITHIUM_CODEGEN_ARM_H_