Rewrite Error.prototype.toString in C++.

src/runtime/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 304 matching lines @@
   F(PromiseRevokeReject, 1, 1)                \
   F(PromiseHasHandlerSymbol, 0, 1)            \
   F(StackGuard, 0, 1)                         \
   F(Interrupt, 0, 1)                          \
   F(AllocateInNewSpace, 1, 1)                 \
   F(AllocateInTargetSpace, 2, 1)              \
   F(CollectStackTrace, 2, 1)                  \
   F(RenderCallSite, 0, 1)                     \
   F(MessageGetStartPosition, 1, 1)            \
   F(MessageGetScript, 1, 1)                   \
+  F(ErrorToStringRT, 1, 1)                    \
   F(FormatMessageString, 4, 1)                \
   F(CallSiteGetFileNameRT, 3, 1)              \
   F(CallSiteGetFunctionNameRT, 3, 1)          \
   F(CallSiteGetScriptNameOrSourceUrlRT, 3, 1) \
   F(CallSiteGetMethodNameRT, 3, 1)            \
   F(CallSiteGetLineNumberRT, 3, 1)            \
   F(CallSiteGetColumnNumberRT, 3, 1)          \
   F(CallSiteIsNativeRT, 3, 1)                 \
   F(CallSiteIsToplevelRT, 3, 1)               \
   F(CallSiteIsEvalRT, 3, 1)                   \
@@ skipping 666 matching lines @@
 inline bool Runtime::AtomicIsLockFree(uint32_t size) {
   return size == 1 || size == 2 || size == 4;
 }
 
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_