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/java_vm_ext.h b/runtime/java_vm_ext.h
index 594027c..4fdf45a 100644
--- a/runtime/java_vm_ext.h
+++ b/runtime/java_vm_ext.h
@@ -27,10 +27,10 @@
 namespace art {
 
 namespace mirror {
-  class ArtMethod;
   class Array;
 }  // namespace mirror
 
+class ArtMethod;
 class Libraries;
 class ParsedOptions;
 class Runtime;
@@ -77,7 +77,7 @@
   // such as NewByteArray.
   // If -verbose:third-party-jni is on, we want to log any JNI function calls
   // made by a third-party native method.
-  bool ShouldTrace(mirror::ArtMethod* method) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
+  bool ShouldTrace(ArtMethod* method) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   /**
    * Loads the given shared library. 'path' is an absolute pathname.
@@ -92,7 +92,7 @@
    * Returns a pointer to the code for the native method 'm', found
    * using dlsym(3) on every native library that's been loaded so far.
    */
-  void* FindCodeForNativeMethod(mirror::ArtMethod* m)
+  void* FindCodeForNativeMethod(ArtMethod* m)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
   void DumpForSigQuit(std::ostream& os)