Move mirror::ArtMethod to native

Optimizing + quick tests are passing, devices boot.

TODO: Test and fix bugs in mips64.

Saves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.
Some of the savings are from removal of virtual methods and direct
methods object arrays.

Bug: 19264997
Change-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d
diff --git a/runtime/nth_caller_visitor.h b/runtime/nth_caller_visitor.h
index d2d7fa8..7fe3130 100644
--- a/runtime/nth_caller_visitor.h
+++ b/runtime/nth_caller_visitor.h
@@ -17,8 +17,8 @@
 #ifndef ART_RUNTIME_NTH_CALLER_VISITOR_H_
 #define ART_RUNTIME_NTH_CALLER_VISITOR_H_
 
+#include "art_method.h"
 #include "base/mutex.h"
-#include "mirror/art_method.h"
 #include "stack.h"
 
 namespace art {
@@ -34,7 +34,7 @@
         caller(nullptr) {}
 
   bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
-    mirror::ArtMethod* m = GetMethod();
+    ArtMethod* m = GetMethod();
     bool do_count = false;
     if (m == nullptr || m->IsRuntimeMethod()) {
       // Upcall.
@@ -56,7 +56,7 @@
   const size_t n;
   const bool include_runtime_and_upcalls_;
   size_t count;
-  mirror::ArtMethod* caller;
+  ArtMethod* caller;
 };
 
 }  // namespace art