Restore saved caller FP registers on stub failure

src/ia32/lithium-codegen-ia32.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 180 matching lines @@
                        Register input,
                        Register temporary,
                        Register temporary2);
 
   int GetStackSlotCount() const { return chunk()->spill_slot_count(); }
 
   void Abort(BailoutReason reason);
 
   void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code, zone()); }
 
+  void SaveCallerDoubles();
+  void RestoreCallerDoubles();
+
   // Code generation passes.  Returns true if code generation should
   // continue.
   void GenerateBodyInstructionPre(LInstruction* instr) V8_OVERRIDE;
   void GenerateBodyInstructionPost(LInstruction* instr) V8_OVERRIDE;
   bool GeneratePrologue();
   bool GenerateDeferredCode();
   bool GenerateJumpTable();
   bool GenerateSafepointTable();
 
   // Generates the custom OSR entrypoint and sets the osr_pc_offset.
@@ skipping 324 matching lines @@
   Label exit_;
   Label* external_exit_;
   Label done_;
   int instruction_index_;
   LCodeGen::X87Stack x87_stack_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_LITHIUM_CODEGEN_IA32_H_