Revert "Revert "Revert "JIT JNI stubs."""

Still seeing occasional failures on 667-jit-jni-stub

Bug: 65574695
Bug: 69843562

This reverts commit e7441631a11e2e07ce863255a59ee4de29c6a56f.

Change-Id: I3db751679ef7bdf31c933208aaffe4fac749a14b
diff --git a/runtime/art_method-inl.h b/runtime/art_method-inl.h
index 31abf94..50913de 100644
--- a/runtime/art_method-inl.h
+++ b/runtime/art_method-inl.h
@@ -95,12 +95,10 @@
   return method_index_;
 }
 
-template <ReadBarrierOption kReadBarrierOption>
 inline uint32_t ArtMethod::GetDexMethodIndex() {
   if (kCheckDeclaringClassState) {
-    CHECK(IsRuntimeMethod() ||
-          GetDeclaringClass<kReadBarrierOption>()->IsIdxLoaded() ||
-          GetDeclaringClass<kReadBarrierOption>()->IsErroneous());
+    CHECK(IsRuntimeMethod() || GetDeclaringClass()->IsIdxLoaded() ||
+          GetDeclaringClass()->IsErroneous());
   }
   return GetDexMethodIndexUnchecked();
 }
@@ -204,14 +202,7 @@
 inline const char* ArtMethod::GetShorty(uint32_t* out_length) {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
-  // Don't do a read barrier in the DCHECK() inside GetDexMethodIndex() as GetShorty()
-  // can be called when the declaring class is about to be unloaded and cannot be added
-  // to the mark stack (subsequent GC assertion would fail).
-  // It is safe to avoid the read barrier as the ArtMethod is constructed with a declaring
-  // Class already satisfying the DCHECK() inside GetDexMethodIndex(), so even if that copy
-  // of declaring class becomes a from-space object, it shall satisfy the DCHECK().
-  return dex_file->GetMethodShorty(dex_file->GetMethodId(GetDexMethodIndex<kWithoutReadBarrier>()),
-                                   out_length);
+  return dex_file->GetMethodShorty(dex_file->GetMethodId(GetDexMethodIndex()), out_length);
 }
 
 inline const Signature ArtMethod::GetSignature() {
@@ -328,7 +319,7 @@
 
 template <ReadBarrierOption kReadBarrierOption>
 inline mirror::DexCache* ArtMethod::GetDexCache() {
-  if (LIKELY(!IsObsolete<kReadBarrierOption>())) {
+  if (LIKELY(!IsObsolete())) {
     mirror::Class* klass = GetDeclaringClass<kReadBarrierOption>();
     return klass->GetDexCache<kDefaultVerifyFlags, kReadBarrierOption>();
   } else {