Remove object_utils.h.

Break into object_lock, field_helper and method_helper.
Clean up header files following this.
Also tidy some of the Handle code in response to compiler errors when resolving
the changes in this CL.

Change-Id: I73e63015a0f02a754d0866bfaf58208aebcaa295
diff --git a/runtime/gc/accounting/space_bitmap.cc b/runtime/gc/accounting/space_bitmap.cc
index c0aa43e..39d1f9e 100644
--- a/runtime/gc/accounting/space_bitmap.cc
+++ b/runtime/gc/accounting/space_bitmap.cc
@@ -16,6 +16,13 @@
 
 #include "space_bitmap-inl.h"
 
+#include "base/stringprintf.h"
+#include "mem_map.h"
+#include "mirror/object-inl.h"
+#include "mirror/class.h"
+#include "mirror/art_field.h"
+#include "mirror/object_array.h"
+
 namespace art {
 namespace gc {
 namespace accounting {
@@ -46,6 +53,9 @@
 }
 
 template<size_t kAlignment>
+SpaceBitmap<kAlignment>::~SpaceBitmap() {}
+
+template<size_t kAlignment>
 SpaceBitmap<kAlignment>* SpaceBitmap<kAlignment>::Create(
     const std::string& name, byte* heap_begin, size_t heap_capacity) {
   // Round up since heap_capacity is not necessarily a multiple of kAlignment * kBitsPerWord.