Make line-starts 32-bits TypedData instead of Array of smis.

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 RUNTIME_VM_OBJECT_H_
 #define RUNTIME_VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 3665 matching lines @@
   RawTypedData* kernel_canonical_names() const {
     return raw_ptr()->kernel_canonical_names_;
   }
   void set_kernel_canonical_names(const TypedData& names) const;
 
   RawTokenStream* tokens() const {
     ASSERT(kind() != RawScript::kKernelTag);
     return raw_ptr()->tokens_;
   }
 
-  void set_line_starts(const Array& value) const;
+  void set_line_starts(const TypedData& value) const;
 
   void set_debug_positions(const Array& value) const;
 
   void set_yield_positions(const Array& value) const;
 
   RawArray* yield_positions() const;
 
   void Tokenize(const String& private_key, bool use_shared_tokens = true) const;
 
   RawLibrary* FindLibrary() const;
@@ skipping 37 matching lines @@
                         const String& source,
                         RawScript::Kind kind);
 
  private:
   void set_url(const String& value) const;
   void set_resolved_url(const String& value) const;
   void set_source(const String& value) const;
   void set_kind(RawScript::Kind value) const;
   void set_load_timestamp(int64_t value) const;
   void set_tokens(const TokenStream& value) const;
-  RawArray* line_starts() const;
+  RawTypedData* line_starts() const;
   RawArray* debug_positions() const;
 
   static RawScript* New();
 
   FINAL_HEAP_OBJECT_IMPLEMENTATION(Script, Object);
   friend class Class;
   friend class Precompiler;
 };
 
 class DictionaryIterator : public ValueObject {
@@ skipping 5249 matching lines @@
 
 inline void TypeArguments::SetHash(intptr_t value) const {
   // This is only safe because we create a new Smi, which does not cause
   // heap allocation.
   StoreSmi(&raw_ptr()->hash_, Smi::New(value));
 }
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_OBJECT_H_