Revert r13275 and 13276 (Remove most uses of StringInputBuffer).

src/codegen.cc

 // 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 113 matching lines @@
   bool print_code = Isolate::Current()->bootstrapper()->IsActive()
       ? FLAG_print_builtin_code
       : (FLAG_print_code || (info->IsOptimizing() && FLAG_print_opt_code));
   if (print_code) {
     // Print the source code if available.
     FunctionLiteral* function = info->function();
     if (code->kind() != Code::COMPILED_STUB) {
       Handle<Script> script = info->script();
       if (!script->IsUndefined() && !script->source()->IsUndefined()) {
         PrintF("--- Raw source ---\n");
-        ConsStringIteratorOp op;
-        StringCharacterStream stream(String::cast(script->source()),
-                                     &op,
-                                     function->start_position());
+        StringInputBuffer stream(String::cast(script->source()));
+        stream.Seek(function->start_position());
         // fun->end_position() points to the last character in the stream. We
         // need to compensate by adding one to calculate the length.
         int source_len =
             function->end_position() - function->start_position() + 1;
         for (int i = 0; i < source_len; i++) {
-          if (stream.HasMore()) PrintF("%c", stream.GetNext());
+          if (stream.has_more()) PrintF("%c", stream.GetNext());
         }
         PrintF("\n\n");
       }
     }
     if (info->IsOptimizing()) {
       if (FLAG_print_unopt_code) {
         PrintF("--- Unoptimized code ---\n");
         info->closure()->shared()->code()->Disassemble(
             *function->debug_name()->ToCString());
       }
@@ skipping 64 matching lines @@
   ASSERT(result_size_ == 1 || result_size_ == 2);
 #ifdef _WIN64
   return result | ((result_size_ == 1) ? 0 : 2);
 #else
   return result;
 #endif
 }
 
 
 } }  // namespace v8::internal