Fix a harmless assert and a genuine bug in the GC-safety of stub

src/arm/code-stubs-arm.h

 // Copyright 2011 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 305 matching lines @@
 // so you don't have to set up the frame.
 class WriteInt32ToHeapNumberStub : public CodeStub {
  public:
   WriteInt32ToHeapNumberStub(Register the_int,
                              Register the_heap_number,
                              Register scratch)
       : the_int_(the_int),
         the_heap_number_(the_heap_number),
         scratch_(scratch) { }
 
+  bool CompilingCallsToThisStubIsGCSafe();
+  static void GenerateStubsAheadOfTime();
+
  private:
   Register the_int_;
   Register the_heap_number_;
   Register scratch_;
 
   // Minor key encoding in 16 bits.
   class IntRegisterBits: public BitField<int, 0, 4> {};
   class HeapNumberRegisterBits: public BitField<int, 4, 4> {};
   class ScratchRegisterBits: public BitField<int, 8, 4> {};
 
@@ skipping 261 matching lines @@
 
   class LookupModeBits: public BitField<LookupMode, 0, 1> {};
 
   LookupMode mode_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_CODE_STUBS_ARM_H_