Turn some usages of NewArray with DeleteArray in the same scope into ScopedVector or SmartPointer.

src/platform-linux.cc

 // 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 358 matching lines @@
   free(lib_name);
   fclose(fp);
 #endif
 }
 
 
 int OS::StackWalk(Vector<OS::StackFrame> frames) {
   // backtrace is a glibc extension.
 #ifdef __GLIBC__
   int frames_size = frames.length();
-  void** addresses = NewArray<void*>(frames_size);
+  ScopedVector<void*> addresses(frames_size);
 
-  int frames_count = backtrace(addresses, frames_size);
+  int frames_count = backtrace(addresses.start(), frames_size);
 
-  char** symbols;
-  symbols = backtrace_symbols(addresses, frames_count);
+  char** symbols = backtrace_symbols(addresses.start(), frames_count);
   if (symbols == NULL) {
-    DeleteArray(addresses);
     return kStackWalkError;
   }
 
   for (int i = 0; i < frames_count; i++) {
     frames[i].address = addresses[i];
     // Format a text representation of the frame based on the information
     // available.
     SNPrintF(MutableCStrVector(frames[i].text, kStackWalkMaxTextLen),
              "%s",
              symbols[i]);
     // Make sure line termination is in place.
     frames[i].text[kStackWalkMaxTextLen - 1] = '\0';
   }
 
-  DeleteArray(addresses);
   free(symbols);
 
   return frames_count;
 #else  // ndef __GLIBC__
   return 0;
 #endif  // ndef __GLIBC__
 }
 
 
 // Constants used for mmap.
@@ skipping 421 matching lines @@
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
   active_ = false;
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal