First pass at VulkanViewer

tools/vulkan/win/Window_win.h

Index: tools/vulkan/win/Window_win.h
diff --git a/tools/vulkan/win/Window_win.h b/tools/vulkan/win/Window_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..90d4191e81ee84e3fd270a2150c900aeb4befc0a
--- /dev/null
+++ b/tools/vulkan/win/Window_win.h
@@ -0,0 +1,37 @@
+/*
+* 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 Window_win_DEFINED
+#define Window_win_DEFINED
+
+#include <windows.h>
+#include "../Window.h"
+
+class Window_win : public Window {
+public:
+    Window_win() : Window() {}
+    ~Window_win() override {}
+
+    bool init(HINSTANCE instance);
+
+    void setTitle(const char*) override;
+    void show() override;
+
+    // event callbacks
+    bool onKeyboard(UINT nChar, bool bKeyDown, bool bAltDown);
+    bool onMouse(bool bLeftButtonDown, bool bRightButtonDown, bool bMiddleButtonDown,
+                 bool bSideButton1Down, bool bSideButton2Down, int nMouseWheelDelta,
+                 int xPos, int yPos);
+
+    bool attach(BackEndTypes attachType, int msaaSampleCount, AttachmentInfo*) override;
+
+private:
+    HINSTANCE fHInstance;
+    HWND      fHWnd;
+};
+
+#endif