Use ATTRIBUTE_UNUSED more.

Use it in lieu of UNUSED(), which had some incorrect uses.

Change-Id: If247dce58b72056f6eea84968e7196f0b5bef4da
diff --git a/runtime/entrypoints/quick/quick_alloc_entrypoints.cc b/runtime/entrypoints/quick/quick_alloc_entrypoints.cc
index 28c62a8..4e4f851 100644
--- a/runtime/entrypoints/quick/quick_alloc_entrypoints.cc
+++ b/runtime/entrypoints/quick/quick_alloc_entrypoints.cc
@@ -56,9 +56,8 @@
   return AllocObjectFromCode<false, instrumented_bool>(type_idx, method, self, allocator_type); \
 } \
 extern "C" mirror::Object* artAllocObjectFromCodeResolved##suffix##suffix2( \
-    mirror::Class* klass, ArtMethod* method, Thread* self) \
+    mirror::Class* klass, ArtMethod* method ATTRIBUTE_UNUSED, Thread* self) \
     SHARED_REQUIRES(Locks::mutator_lock_) { \
-  UNUSED(method); \
   ScopedQuickEntrypointChecks sqec(self); \
   if (kUseTlabFastPath && !instrumented_bool && allocator_type == gc::kAllocatorTypeTLAB) { \
     if (LIKELY(klass->IsInitialized())) { \
@@ -83,9 +82,8 @@
   return AllocObjectFromCodeResolved<instrumented_bool>(klass, self, allocator_type); \
 } \
 extern "C" mirror::Object* artAllocObjectFromCodeInitialized##suffix##suffix2( \
-    mirror::Class* klass, ArtMethod* method, Thread* self) \
+    mirror::Class* klass, ArtMethod* method ATTRIBUTE_UNUSED, Thread* self) \
     SHARED_REQUIRES(Locks::mutator_lock_) { \
-  UNUSED(method); \
   ScopedQuickEntrypointChecks sqec(self); \
   if (kUseTlabFastPath && !instrumented_bool && allocator_type == gc::kAllocatorTypeTLAB) { \
     size_t byte_count = klass->GetObjectSize(); \