ART: Rename ArtMethod's size and alignment methods.

Remove the historical prefix "Object" to avoid confusion
with Java objects.

Change-Id: Ib36422c9a24878d8d4bd757977d99cbf66b3d567
diff --git a/runtime/entrypoints/entrypoint_utils.cc b/runtime/entrypoints/entrypoint_utils.cc
index eaf26bc..eaf33f6 100644
--- a/runtime/entrypoints/entrypoint_utils.cc
+++ b/runtime/entrypoints/entrypoint_utils.cc
@@ -298,7 +298,7 @@
           interface_method->GetArtMethod(), sizeof(void*));
       auto* virtual_methods = proxy_class->GetVirtualMethodsPtr();
       size_t num_virtuals = proxy_class->NumVirtualMethods();
-      size_t method_size = ArtMethod::ObjectSize(sizeof(void*));
+      size_t method_size = ArtMethod::Size(sizeof(void*));
       int throws_index = (reinterpret_cast<uintptr_t>(proxy_method) -
           reinterpret_cast<uintptr_t>(virtual_methods)) / method_size;
       CHECK_LT(throws_index, static_cast<int>(num_virtuals));