Move more symbols to the vm isolate.

vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 5002 matching lines @@
   if (FLAG_compiler_stats) {
     CompilerStats::src_length += src.Length();
   }
 }
 
 
 void Script::GetTokenLocation(intptr_t token_pos,
                               intptr_t* line,
                               intptr_t* column) const {
   const String& src = String::Handle(Source());
-  const String& dummy_key = String::Handle(String::New(""));
+  const String& dummy_key = String::Handle(Symbols::Empty());
   const TokenStream& tkns = TokenStream::Handle(tokens());
   intptr_t src_pos = tkns.ComputeSourcePosition(token_pos);
   Scanner scanner(src, dummy_key);
   scanner.ScanTo(src_pos);
   *line = scanner.CurrentPosition().line;
   *column = scanner.CurrentPosition().column;
 }
 
 
 void Script::TokenRangeAtLine(intptr_t line_number,
                               intptr_t* first_token_index,
                               intptr_t* last_token_index) const {
   intptr_t first_src_pos;
   intptr_t last_src_pos;
   const String& src = String::Handle(Source());
-  const String& dummy_key = String::Handle(String::New(""));
+  const String& dummy_key = String::Handle(Symbols::Empty());
   const TokenStream& tkns = TokenStream::Handle(tokens());
   Scanner scanner(src, dummy_key);
   scanner.TokenRangeAtLine(line_number, &first_src_pos, &last_src_pos);
   *first_token_index = tkns.ComputeTokenPosition(first_src_pos);
   *last_token_index = tkns.ComputeTokenPosition(last_src_pos);
 }
 
 
 RawString* Script::GetLine(intptr_t line_number) const {
   const String& src = String::Handle(Source());
@@ skipping 10 matching lines @@
       current_line++;
     } else if (src.CharAt(ix) == '\r') {
       if ((ix + 1 != src.Length()) && (src.CharAt(ix + 1) != '\n')) {
         current_line++;
       }
     } else {
       last_char = ix;
     }
   }
   // Guarantee that returned string is never NULL.
-  String& line = String::Handle(Symbols::New(""));
+  String& line = String::Handle(Symbols::Empty());
   if (line_start >= 0) {
     line = String::SubString(src, line_start, last_char - line_start + 1);
   }
   return line.raw();
 }
 
 
 RawString* Script::GetSnippet(intptr_t from_line,
                               intptr_t from_column,
                               intptr_t to_line,
@@ skipping 5689 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart