More elimination of new space allocation, fix bugs in Symbols::FromConcatAll

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 6298 matching lines @@
     return &str.UnsafeMutableNonPointer(raw_ptr(str)->data())[index];
   }
 
   static RawOneByteString* ReadFrom(SnapshotReader* reader,
                                     intptr_t object_id,
                                     intptr_t tags,
                                     Snapshot::Kind kind);
 
   friend class Class;
   friend class String;
+  friend class Symbols;
   friend class ExternalOneByteString;
   friend class SnapshotReader;
   friend class StringHasher;
 };
 
 
 class TwoByteString : public AllStatic {
  public:
   static uint16_t CharAt(const String& str, intptr_t index) {
     ASSERT((index >= 0) && (index < str.Length()));
@@ skipping 95 matching lines @@
   }
 
   static RawTwoByteString* ReadFrom(SnapshotReader* reader,
                                     intptr_t object_id,
                                     intptr_t tags,
                                     Snapshot::Kind kind);
 
   friend class Class;
   friend class String;
   friend class SnapshotReader;
+  friend class Symbols;
 };
 
 
 class ExternalOneByteString : public AllStatic {
  public:
   static uint16_t CharAt(const String& str, intptr_t index) {
     NoSafepointScope no_safepoint;
     return *CharAddr(str, index);
   }
 
@@ skipping 1607 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_