Restructure public side of view_manager service.

mojo/services/public/cpp/view_manager/lib/view_observer.cc

Index: mojo/services/public/cpp/view_manager/lib/view_observer.cc
diff --git a/mojo/services/public/cpp/view_manager/lib/view_observer.cc b/mojo/services/public/cpp/view_manager/lib/view_observer.cc
deleted file mode 100644
index 812c028dce8d70efaefb7e5cfc895fe19a63eda2..0000000000000000000000000000000000000000
--- a/mojo/services/public/cpp/view_manager/lib/view_observer.cc
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "mojo/services/public/cpp/view_manager/view_observer.h"
-
-#include "base/basictypes.h"
-
-namespace mojo {
-
-////////////////////////////////////////////////////////////////////////////////
-// ViewObserver, public:
-
-ViewObserver::TreeChangeParams::TreeChangeParams()
-    : target(NULL),
-      old_parent(NULL),
-      new_parent(NULL),
-      receiver(NULL) {}
-
-}  // namespace mojo