Improve compiler stats

- report the max size of arena alloc
- report how many virtual or interface invokes were inlined

Change-Id: I82f154a8e25b5e3890181a1aa11346cdc3f93e37
diff --git a/compiler/optimizing/optimizing_compiler_stats.h b/compiler/optimizing/optimizing_compiler_stats.h
index 179004b..ecbe371 100644
--- a/compiler/optimizing/optimizing_compiler_stats.h
+++ b/compiler/optimizing/optimizing_compiler_stats.h
@@ -60,6 +60,8 @@
   kIntrinsicRecognized,
   kLoopInvariantMoved,
   kSelectGenerated,
+  kRemovedInstanceOf,
+  kInlinedInvokeVirtualOrInterface,
   kLastStat
 };
 
@@ -133,6 +135,8 @@
       case kIntrinsicRecognized : name = "IntrinsicRecognized"; break;
       case kLoopInvariantMoved : name = "LoopInvariantMoved"; break;
       case kSelectGenerated : name = "SelectGenerated"; break;
+      case kRemovedInstanceOf: name = "RemovedInstanceOf"; break;
+      case kInlinedInvokeVirtualOrInterface: name = "InlinedInvokeVirtualOrInterface"; break;
 
       case kLastStat:
         LOG(FATAL) << "invalid stat "