Implement LSR instructions for the integrated ARM assembler.

src/DartARM32/assembler_arm.h

Index: src/DartARM32/assembler_arm.h
diff --git a/src/DartARM32/assembler_arm.h b/src/DartARM32/assembler_arm.h
index ddf1c5f1d83ff3296c46e46c3488c22a2f0c45ef..e33530733b8274bf5c3d89a9c6aa4d9b2c3df506 100644
--- a/src/DartARM32/assembler_arm.h
+++ b/src/DartARM32/assembler_arm.h
@@ -965,10 +965,12 @@ class Assembler : public ValueObject {
            Condition cond = AL);
   // Moved to ARM32::AssemblerARM32::lsl()
   void Lsl(Register rd, Register rm, Register rs, Condition cond = AL);
-#endif
+  // Moved to ARM32::AssemblerARM32::lsr()
   void Lsr(Register rd, Register rm, const Operand& shift_imm,
            Condition cond = AL);
+  // Moved to ARM32::AssemblerARM32::lsr()
   void Lsr(Register rd, Register rm, Register rs, Condition cond = AL);
+#endif
   void Asr(Register rd, Register rm, const Operand& shift_imm,
            Condition cond = AL);
   void Asr(Register rd, Register rm, Register rs, Condition cond = AL);