Rewrite decodeURL as builtin function, remove now unused runtime functions.

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-search.h"
@@ skipping 1106 matching lines @@
         right > left &&
         unicode_cache->IsWhiteSpaceOrLineTerminator(string->Get(right - 1))) {
       right--;
     }
   }
 
   return *isolate->factory()->NewSubString(string, left, right);
 }
 
 
-RUNTIME_FUNCTION(Runtime_TruncateString) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
-  CONVERT_ARG_HANDLE_CHECKED(SeqString, string, 0);
-  CONVERT_INT32_ARG_CHECKED(new_length, 1);
-  RUNTIME_ASSERT(new_length >= 0);
-  return *SeqString::Truncate(string, new_length);
-}
-
-
-RUNTIME_FUNCTION(Runtime_NewString) {
-  HandleScope scope(isolate);
-  DCHECK(args.length() == 2);
-  CONVERT_INT32_ARG_CHECKED(length, 0);
-  CONVERT_BOOLEAN_ARG_CHECKED(is_one_byte, 1);
-  if (length == 0) return isolate->heap()->empty_string();
-  Handle<String> result;
-  if (is_one_byte) {
-    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-        isolate, result, isolate->factory()->NewRawOneByteString(length));
-  } else {
-    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-        isolate, result, isolate->factory()->NewRawTwoByteString(length));
-  }
-  return *result;
-}
-
-
 RUNTIME_FUNCTION(Runtime_StringLessThan) {
   HandleScope handle_scope(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_HANDLE_CHECKED(String, x, 0);
   CONVERT_ARG_HANDLE_CHECKED(String, y, 1);
   switch (String::Compare(x, y)) {
     case ComparisonResult::kLessThan:
       return isolate->heap()->true_value();
     case ComparisonResult::kEqual:
     case ComparisonResult::kGreaterThan:
@@ skipping 107 matching lines @@
 }
 
 RUNTIME_FUNCTION(Runtime_ExternalStringGetChar) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(2, args.length());
   CONVERT_ARG_CHECKED(ExternalString, string, 0);
   CONVERT_INT32_ARG_CHECKED(index, 1);
   return Smi::FromInt(string->Get(index));
 }
 
-RUNTIME_FUNCTION(Runtime_OneByteSeqStringGetChar) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 2);
-  CONVERT_ARG_CHECKED(SeqOneByteString, string, 0);
-  CONVERT_INT32_ARG_CHECKED(index, 1);
-  return Smi::FromInt(string->SeqOneByteStringGet(index));
-}
-
-
-RUNTIME_FUNCTION(Runtime_OneByteSeqStringSetChar) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 3);
-  CONVERT_INT32_ARG_CHECKED(index, 0);
-  CONVERT_INT32_ARG_CHECKED(value, 1);
-  CONVERT_ARG_CHECKED(SeqOneByteString, string, 2);
-  string->SeqOneByteStringSet(index, value);
-  return string;
-}
-
-
-RUNTIME_FUNCTION(Runtime_TwoByteSeqStringGetChar) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 2);
-  CONVERT_ARG_CHECKED(SeqTwoByteString, string, 0);
-  CONVERT_INT32_ARG_CHECKED(index, 1);
-  return Smi::FromInt(string->SeqTwoByteStringGet(index));
-}
-
-
-RUNTIME_FUNCTION(Runtime_TwoByteSeqStringSetChar) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 3);
-  CONVERT_INT32_ARG_CHECKED(index, 0);
-  CONVERT_INT32_ARG_CHECKED(value, 1);
-  CONVERT_ARG_CHECKED(SeqTwoByteString, string, 2);
-  string->SeqTwoByteStringSet(index, value);
-  return string;
-}
-
-
 RUNTIME_FUNCTION(Runtime_StringCharCodeAt) {
   SealHandleScope shs(isolate);
   DCHECK(args.length() == 2);
   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