Use the new HCurrentMethod in HLoadString.

Change-Id: I23d27e5e10736d127519eb3238ff8f25df3843a2
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index 869809d..3144c5c 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -3544,12 +3544,14 @@
   DISALLOW_COPY_AND_ASSIGN(HLoadClass);
 };
 
-class HLoadString : public HExpression<0> {
+class HLoadString : public HExpression<1> {
  public:
-  HLoadString(uint32_t string_index, uint32_t dex_pc)
+  HLoadString(HCurrentMethod* current_method, uint32_t string_index, uint32_t dex_pc)
       : HExpression(Primitive::kPrimNot, SideEffects::None()),
         string_index_(string_index),
-        dex_pc_(dex_pc) {}
+        dex_pc_(dex_pc) {
+    SetRawInputAt(0, current_method);
+  }
 
   bool CanBeMoved() const OVERRIDE { return true; }