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/proxy_test.cc b/runtime/proxy_test.cc
index 93d1f66..f40c0f1 100644
--- a/runtime/proxy_test.cc
+++ b/runtime/proxy_test.cc
@@ -52,8 +52,7 @@
     // Builds the method array.
     jsize methods_count = 3;  // Object.equals, Object.hashCode and Object.toString.
     for (mirror::Class* interface : interfaces) {
-      mirror::ObjectArray<mirror::ArtMethod>* virtual_methods = interface->GetVirtualMethods();
-      methods_count += (virtual_methods == nullptr) ? 0 : virtual_methods->GetLength();
+      methods_count += interface->NumVirtualMethods();
     }
     jobjectArray proxyClassMethods = soa.Env()->NewObjectArray(
         methods_count, soa.AddLocalReference<jclass>(mirror::Method::StaticClass()), nullptr);
@@ -61,28 +60,29 @@
 
     jsize array_index = 0;
     // Fill the method array
-    mirror::ArtMethod* method = javaLangObject->FindDeclaredVirtualMethod(
-        "equals", "(Ljava/lang/Object;)Z");
+    ArtMethod* method = javaLangObject->FindDeclaredVirtualMethod(
+        "equals", "(Ljava/lang/Object;)Z", sizeof(void*));
     CHECK(method != nullptr);
     soa.Env()->SetObjectArrayElement(
         proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
             mirror::Method::CreateFromArtMethod(soa.Self(), method)));
-    method = javaLangObject->FindDeclaredVirtualMethod("hashCode", "()I");
+    method = javaLangObject->FindDeclaredVirtualMethod("hashCode", "()I", sizeof(void*));
     CHECK(method != nullptr);
     soa.Env()->SetObjectArrayElement(
         proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
             mirror::Method::CreateFromArtMethod(soa.Self(), method)));
-    method = javaLangObject->FindDeclaredVirtualMethod("toString", "()Ljava/lang/String;");
+    method = javaLangObject->FindDeclaredVirtualMethod(
+        "toString", "()Ljava/lang/String;", sizeof(void*));
     CHECK(method != nullptr);
     soa.Env()->SetObjectArrayElement(
         proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
             mirror::Method::CreateFromArtMethod(soa.Self(), method)));
     // Now adds all interfaces virtual methods.
     for (mirror::Class* interface : interfaces) {
-      for (int32_t i = 0, count = interface->NumVirtualMethods(); i < count; ++i) {
+      for (auto& m : interface->GetVirtualMethods(sizeof(void*))) {
         soa.Env()->SetObjectArrayElement(
             proxyClassMethods, array_index++, soa.AddLocalReference<jobject>(
-                mirror::Method::CreateFromArtMethod(soa.Self(), interface->GetVirtualMethod(i))));
+                mirror::Method::CreateFromArtMethod(soa.Self(), &m)));
       }
     }
     CHECK_EQ(array_index, methods_count);