RegExp: Remove unnecessary function from ARM specific code and convert condition to assertion.

src/arm/regexp-macro-assembler-arm.h

 // Copyright 2006-2008 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 27 matching lines @@
   RegExpMacroAssemblerARM();
   virtual ~RegExpMacroAssemblerARM();
 };
 
 #else
 class RegExpMacroAssemblerARM: public NativeRegExpMacroAssembler {
  public:
   RegExpMacroAssemblerARM(Mode mode, int registers_to_save);
   virtual ~RegExpMacroAssemblerARM();
   virtual int stack_limit_slack();
-  virtual bool CanReadUnaligned();
   virtual void AdvanceCurrentPosition(int by);
   virtual void AdvanceRegister(int reg, int by);
   virtual void Backtrack();
   virtual void Bind(Label* label);
   virtual void CheckAtStart(Label* on_at_start);
   virtual void CheckCharacter(uint32_t c, Label* on_equal);
   virtual void CheckCharacterAfterAnd(uint32_t c,
                                       uint32_t mask,
                                       Label* on_equal);
   virtual void CheckCharacterGT(uc16 limit, Label* on_greater);
@@ skipping 201 matching lines @@
   Label stack_overflow_label_;
 };
 
 
 #endif  // V8_NATIVE_REGEXP
 
 
 }}  // namespace v8::internal
 
 #endif  // V8_ARM_REGEXP_MACRO_ASSEMBLER_ARM_H_