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/fault_handler.h b/runtime/fault_handler.h
index adac4c2..3b03a14 100644
--- a/runtime/fault_handler.h
+++ b/runtime/fault_handler.h
@@ -27,10 +27,7 @@
 
 namespace art {
 
-namespace mirror {
 class ArtMethod;
-}  // namespace mirror
-
 class FaultHandler;
 
 class FaultManager {
@@ -58,7 +55,7 @@
   // The IsInGeneratedCode() function checks that the mutator lock is held before it
   // calls GetMethodAndReturnPCAndSP().
   // TODO: think about adding lock assertions and fake lock and unlock functions.
-  void GetMethodAndReturnPcAndSp(siginfo_t* siginfo, void* context, mirror::ArtMethod** out_method,
+  void GetMethodAndReturnPcAndSp(siginfo_t* siginfo, void* context, ArtMethod** out_method,
                                  uintptr_t* out_return_pc, uintptr_t* out_sp)
                                  NO_THREAD_SAFETY_ANALYSIS;
   bool IsInGeneratedCode(siginfo_t* siginfo, void *context, bool check_dex_pc)