Update comment to provide the correct usage of the Disassembler class....

src/arm/disasm-arm.cc

 // Copyright 2010 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 16 matching lines @@
 
 // A Disassembler object is used to disassemble a block of code instruction by
 // instruction. The default implementation of the NameConverter object can be
 // overriden to modify register names or to do symbol lookup on addresses.
 //
 // The example below will disassemble a block of code and print it to stdout.
 //
 //   NameConverter converter;
 //   Disassembler d(converter);
 //   for (byte* pc = begin; pc < end;) {
-//     char buffer[128];
-//     buffer[0] = '\0';
+//     v8::internal::EmbeddedVector<char, 256> buffer;
 //     byte* prev_pc = pc;
-//     pc += d.InstructionDecode(buffer, sizeof buffer, pc);
+//     pc += d.InstructionDecode(buffer, pc);
 //     printf("%p    %08x      %s\n",
 //            prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer);
 //   }
 //
 // The Disassembler class also has a convenience method to disassemble a block
 // of code into a FILE*, meaning that the above functionality could also be
 // achieved by just calling Disassembler::Disassemble(stdout, begin, end);
 
 
 #include <assert.h>
@@ skipping 1252 matching lines @@
     buffer[0] = '\0';
     byte* prev_pc = pc;
     pc += d.InstructionDecode(buffer, pc);
     fprintf(f, "%p    %08x      %s\n",
             prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 }  // namespace disasm