Directory restructuring of object.h

Break object.h into constituent files.
Reduce number of #includes in other GC header files.
Introduce -inl.h files to avoid mirror files #include-ing each other.
Check invariants of verifier RegTypes for all constructors.

Change-Id: Iecf1171c02910ac152d52947330ef456df4043bc
diff --git a/src/root_visitor.h b/src/root_visitor.h
new file mode 100644
index 0000000..d53acd3
--- /dev/null
+++ b/src/root_visitor.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_SRC_ROOT_VISITOR_H_
+#define ART_SRC_ROOT_VISITOR_H_
+
+namespace art {
+namespace mirror {
+class Object;
+}  // namespace mirror
+class StackVisitor;
+
+typedef void (RootVisitor)(const mirror::Object* root, void* arg);
+typedef void (VerifyRootVisitor)(const mirror::Object* root, void* arg, size_t vreg,
+                                 const StackVisitor* visitor);
+typedef bool (IsMarkedTester)(const mirror::Object* object, void* arg);
+
+}  // namespace art
+
+#endif  // ART_SRC_ROOT_VISITOR_H_