More refactoring for Viewer

tools/viewer/Application.h

Index: tools/viewer/Application.h
diff --git a/tools/viewer/Application.h b/tools/viewer/Application.h
deleted file mode 100644
index 235ff09ed4ed73e7b78ce5d958ecde27d0d54104..0000000000000000000000000000000000000000
--- a/tools/viewer/Application.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
-* Copyright 2016 Google Inc.
-*
-* Use of this source code is governed by a BSD-style license that can be
-* found in the LICENSE file.
-*/
-
-#ifndef Application_DEFINED
-#define Application_DEFINED
-
-namespace sk_app {
-
-class Application {
-public:
-    static Application* Create(int argc, char** argv, void* platformData);
-
-    virtual ~Application() {}
-
-    virtual void onIdle(double ms) = 0;
-};
-
-}   // namespace sk_app
-
-#endif