Revert of [string] Migrate String.prototype.{split,replace} to TF

src/runtime/runtime-strings.cc

 // Copyright 2014 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.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/regexp/jsregexp-inl.h"
 #include "src/string-builder.h"
 #include "src/string-case.h"
 #include "src/string-search.h"
 
 namespace v8 {
 namespace internal {
 
-RUNTIME_FUNCTION(Runtime_GetSubstitution) {
-  HandleScope scope(isolate);
-  DCHECK_EQ(4, args.length());
-  CONVERT_ARG_HANDLE_CHECKED(String, matched, 0);
-  CONVERT_ARG_HANDLE_CHECKED(String, subject, 1);
-  CONVERT_SMI_ARG_CHECKED(position, 2);
-  CONVERT_ARG_HANDLE_CHECKED(String, replacement, 3);
-
-  // A simple match without captures.
-  class SimpleMatch : public String::Match {
-   public:
-    SimpleMatch(Handle<String> match, Handle<String> prefix,
-                Handle<String> suffix)
-        : match_(match), prefix_(prefix), suffix_(suffix) {}
-
-    Handle<String> GetMatch() override { return match_; }
-    MaybeHandle<String> GetCapture(int i, bool* capture_exists) override {
-      *capture_exists = false;
-      return match_;  // Return arbitrary string handle.
-    }
-    Handle<String> GetPrefix() override { return prefix_; }
-    Handle<String> GetSuffix() override { return suffix_; }
-    int CaptureCount() override { return 0; }
-
-   private:
-    Handle<String> match_, prefix_, suffix_;
-  };
-
-  Handle<String> prefix =
-      isolate->factory()->NewSubString(subject, 0, position);
-  Handle<String> suffix = isolate->factory()->NewSubString(
-      subject, position + matched->length(), subject->length());
-  SimpleMatch match(matched, prefix, suffix);
-
-  RETURN_RESULT_OR_FAILURE(
-      isolate, String::GetSubstitution(isolate, &match, replacement));
-}
-
 // This may return an empty MaybeHandle if an exception is thrown or
 // we abort due to reaching the recursion limit.
 MaybeHandle<String> StringReplaceOneCharWithString(
     Isolate* isolate, Handle<String> subject, Handle<String> search,
     Handle<String> replace, bool* found, int recursion_limit) {
   StackLimitCheck stackLimitCheck(isolate);
   if (stackLimitCheck.HasOverflowed() || (recursion_limit == 0)) {
     return MaybeHandle<String>();
   }
   recursion_limit--;
@@ skipping 861 matching lines @@
   SealHandleScope shs(isolate);
   DCHECK_EQ(2, args.length());
   if (!args[0]->IsString()) return isolate->heap()->undefined_value();
   if (!args[1]->IsNumber()) return isolate->heap()->undefined_value();
   if (std::isinf(args.number_at(1))) return isolate->heap()->nan_value();
   return __RT_impl_Runtime_StringCharCodeAtRT(args, isolate);
 }
 
 }  // namespace internal
 }  // namespace v8