Refactor java.lang.reflect implementation

Cherry-picked from commit ed41d5c44299ec5d44b8514f6e17f802f48094d1.

Move to ArtMethod/Field instead of AbstractMethod/Field and have
java.lang.reflect APIs delegate to ArtMethod/ArtField.

Bug: 10014286.

Change-Id: Iafc1d8c5b62562c9af8fb9fd8c5e1d61270536e7
diff --git a/runtime/nth_caller_visitor.h b/runtime/nth_caller_visitor.h
index e3593d8..794878a 100644
--- a/runtime/nth_caller_visitor.h
+++ b/runtime/nth_caller_visitor.h
@@ -17,7 +17,7 @@
 #ifndef ART_RUNTIME_NTH_CALLER_VISITOR_H_
 #define ART_RUNTIME_NTH_CALLER_VISITOR_H_
 
-#include "mirror/abstract_method.h"
+#include "mirror/art_method.h"
 #include "locks.h"
 #include "stack.h"
 
@@ -31,7 +31,7 @@
         count(0), caller(NULL) {}
 
   bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
-    mirror::AbstractMethod* m = GetMethod();
+    mirror::ArtMethod* m = GetMethod();
     bool do_count = false;
     if (m == NULL || m->IsRuntimeMethod()) {
       // Upcall.
@@ -53,7 +53,7 @@
   const size_t n;
   const bool include_runtime_and_upcalls_;
   size_t count;
-  mirror::AbstractMethod* caller;
+  mirror::ArtMethod* caller;
 };
 
 }  // namespace art