Re-enable OSR.

Fixes two bugs:
- Dealing with proxy methods, which the compiler and code cache
  does not handle.
- Dealing with phi types, that may have been speculatively optimized
  but do not hold once jumping to the compiled code.

Change-Id: I7dcd9976ef7b12128fff95d2b7ed3e69cc42e90a
diff --git a/compiler/optimizing/ssa_builder.cc b/compiler/optimizing/ssa_builder.cc
index 165d09d..c08e5dd 100644
--- a/compiler/optimizing/ssa_builder.cc
+++ b/compiler/optimizing/ssa_builder.cc
@@ -483,7 +483,7 @@
 
   // 6) Compute type of reference type instructions. The pass assumes that
   // NullConstant has been fixed up.
-  ReferenceTypePropagation(GetGraph(), handles_).Run();
+  ReferenceTypePropagation(GetGraph(), handles_, /* is_first_run */ true).Run();
 
   // 7) Step 1) duplicated ArrayGet instructions with ambiguous type (int/float
   // or long/double) and marked ArraySets with ambiguous input type. Now that RTP