Revert "Changing string length field type from int to SMI."

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 4c06f376bb6bd6c10d34237af8cd59fce1c69a9b..062c5c6782c427ee28434bb9cb5257a06ec0d0b1 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -553,12 +553,6 @@ class MacroAssembler: public Assembler {
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);
 
-  void InitializeNewString(Register string,
-                           Register length,
-                           Heap::RootListIndex map_index,
-                           Register scratch1,
-                           Register scratch2);
-
   bool generating_stub_;
   bool allow_stub_calls_;
   // This handle will be patched with the code object on installation.