Revert "Tweak inlining heuristics."

This reverts commit fcb7613d3aaa9a6802800b6e957aaad51cedf6dc.

Change-Id: Idc0df6a2f68e8b5aa740bb1259f19c2953811510
diff --git a/compiler/driver/compiler_options.h b/compiler/driver/compiler_options.h
index 38c2927..e6acab4 100644
--- a/compiler/driver/compiler_options.h
+++ b/compiler/driver/compiler_options.h
@@ -52,7 +52,7 @@
   static const bool kDefaultGenerateDebugInfo = kIsDebugBuild;
   static const bool kDefaultIncludePatchInformation = false;
   static const size_t kDefaultInlineDepthLimit = 3;
-  static const size_t kDefaultInlineMaxCodeUnits = 32;
+  static const size_t kDefaultInlineMaxCodeUnits = 20;
   static constexpr size_t kUnsetInlineDepthLimit = -1;
   static constexpr size_t kUnsetInlineMaxCodeUnits = -1;