Rollback stacktrace change.

runtime/vm/exceptions.cc

Index: runtime/vm/exceptions.cc
===================================================================
--- runtime/vm/exceptions.cc	(revision 20494)
+++ runtime/vm/exceptions.cc	(working copy)
@@ -365,30 +365,6 @@
 }
 
 
-const char* Exceptions::CreateStackTrace() {
-  Isolate* isolate = Isolate::Current();
-  Stacktrace& stacktrace = Stacktrace::Handle(isolate);
-  stacktrace ^= isolate->object_store()->preallocated_stack_trace();
-  RegularStacktraceBuilder frame_builder;
-  uword handler_pc = 0;
-  uword handler_sp = 0;
-  uword handler_fp = 0;
-  FindExceptionHandler(&handler_pc,
-                       &handler_sp,
-                       &handler_fp,
-                       &frame_builder);
-  const Array& func_array =
-      Array::Handle(isolate, Array::MakeArray(frame_builder.func_list()));
-  const Array& code_array =
-      Array::Handle(isolate, Array::MakeArray(frame_builder.code_list()));
-  const Array& pc_offset_array =
-      Array::Handle(isolate,
-                    Array::MakeArray(frame_builder.pc_offset_list()));
-  stacktrace = Stacktrace::New(func_array, code_array, pc_offset_array);
-  return stacktrace.ToCString();
-}
-
-
 // Static helpers for allocating, initializing, and throwing an error instance.
 
 // Return the script of the Dart function that called the native entry or the