Revert "Revert "Revert "ART: Improve JitProfile perf in arm/arm64 mterp"""

This reverts commit 4a8ac9cee4312ac910fabf31c64d28d4c8362836.

570-checker-osr intermittently failing.

Bug: 27939339
diff --git a/runtime/jit/jit_instrumentation.h b/runtime/jit/jit_instrumentation.h
index 7ffd4eb..d1c5c44 100644
--- a/runtime/jit/jit_instrumentation.h
+++ b/runtime/jit/jit_instrumentation.h
@@ -40,8 +40,6 @@
 class Thread;
 
 namespace jit {
-static constexpr int16_t kJitCheckForOSR = -1;
-static constexpr int16_t kJitHotnessDisabled = -2;
 
 class JitInstrumentationCache;
 
@@ -86,6 +84,7 @@
 
   static constexpr uint32_t kJitEvents =
       instrumentation::Instrumentation::kMethodEntered |
+      instrumentation::Instrumentation::kBranch |
       instrumentation::Instrumentation::kInvokeVirtualOrInterface;
 
  private:
@@ -97,33 +96,25 @@
 // Keeps track of which methods are hot.
 class JitInstrumentationCache {
  public:
-  JitInstrumentationCache(uint16_t hot_method_threshold,
-                          uint16_t warm_method_threshold,
-                          uint16_t osr_method_threshold);
-  void AddSamples(Thread* self, ArtMethod* method, uint16_t samples)
+  JitInstrumentationCache(size_t hot_method_threshold,
+                          size_t warm_method_threshold,
+                          size_t osr_method_threshold);
+  void AddSamples(Thread* self, ArtMethod* method, size_t samples)
       SHARED_REQUIRES(Locks::mutator_lock_);
   void CreateThreadPool();
   void DeleteThreadPool(Thread* self);
 
-  size_t OSRMethodThreshold() const {
-    return osr_method_threshold_;
-  }
-
   size_t HotMethodThreshold() const {
     return hot_method_threshold_;
   }
 
-  size_t WarmMethodThreshold() const {
-    return warm_method_threshold_;
-  }
-
   // Wait until there is no more pending compilation tasks.
   void WaitForCompilationToFinish(Thread* self);
 
  private:
-  uint16_t hot_method_threshold_;
-  uint16_t warm_method_threshold_;
-  uint16_t osr_method_threshold_;
+  size_t hot_method_threshold_;
+  size_t warm_method_threshold_;
+  size_t osr_method_threshold_;
   JitInstrumentationListener listener_;
   std::unique_ptr<ThreadPool> thread_pool_;