Fix a bunch of spelling mistakes :\

src/simulator-arm.h

 // Copyright 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 88 matching lines @@
   void set_pc(int32_t value);
   int32_t get_pc() const;
 
   // Accessor to the internal simulator stack area.
   uintptr_t StackLimit() const;
 
   // Executes ARM instructions until the PC reaches end_sim_pc.
   void Execute();
 
   // V8 generally calls into generated code with 5 parameters. This is a
-  // convenience funtion, which sets up the simulator state and grabs the
+  // convenience function, which sets up the simulator state and grabs the
   // result on return.
   v8::internal::Object* Call(int32_t entry, int32_t p0, int32_t p1,
                              int32_t p2, int32_t p3, int32_t p4);
 
  private:
   enum special_values {
     // Known bad pc value to ensure that the simulator does not execute
     // without being properly setup.
     bad_lr = -1,
     // A pc value used to signal the simulator to stop execution.  Generally
@@ skipping 69 matching lines @@
   // registered breakpoints
   Instr* break_pc_;
   instr_t break_instr_;
 };
 
 } }  // namespace assembler::arm
 
 #endif  // defined(__arm__)
 
 #endif  // V8_SIMULATOR_ARM_H_