Use first position in LAllocator ordering heuristic.

src/lithium-allocator.cc

Index: src/lithium-allocator.cc
diff --git a/src/lithium-allocator.cc b/src/lithium-allocator.cc
index d66f6b096a43770a3f88a6f8db26431a674bb33e..c80c4670e40a01cd210cc1260c030699e4212a1b 100644
--- a/src/lithium-allocator.cc
+++ b/src/lithium-allocator.cc
@@ -377,7 +377,7 @@ bool LiveRange::ShouldBeAllocatedBefore(const LiveRange* other) const {
   LifetimePosition start = Start();
   LifetimePosition other_start = other->Start();
   if (start.Value() == other_start.Value()) {
-    UsePosition* pos = FirstPosWithHint();
+    UsePosition* pos = first_pos();
     if (pos == NULL) return false;
     UsePosition* other_pos = other->first_pos();
     if (other_pos == NULL) return true;