remove OS::StackWalk

src/platform-freebsd.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 181 matching lines @@
     LOG(isolate SharedLibraryEvent(start_of_path, start, end));
   }
   close(fd);
 }
 
 
 void OS::SignalCodeMovingGC() {
 }
 
 
-int OS::StackWalk(Vector<OS::StackFrame> frames) {
-  return POSIXBacktraceHelper<backtrace, backtrace_symbols>::StackWalk(frames);
-}
-
 
 // Constants used for mmap.
 static const int kMmapFd = -1;
 static const int kMmapFdOffset = 0;
 
 
 VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { }
 
 
 VirtualMemory::VirtualMemory(size_t size)
@@ skipping 118 matching lines @@
   return munmap(base, size) == 0;
 }
 
 
 bool VirtualMemory::HasLazyCommits() {
   // TODO(alph): implement for the platform.
   return false;
 }
 
 } }  // namespace v8::internal