Some more improvements/fixes to the VulkanViewer

tools/vulkan/Window.h

 /*
 * 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_DEFINED
 #define Window_DEFINED
 
 #include "SkTypes.h"
 
 class SkCanvas;
 class VulkanTestContext;
 
 class Window {
 public:
     static Window* CreateNativeWindow(void* platformData);
 
     virtual ~Window() {};
 
     virtual void setTitle(const char*) = 0;
     virtual void show() = 0;
 
     struct AttachmentInfo {
         int fSampleCount;
         int fStencilBits;
     };
 
-    enum BackEndTypes {
+    enum BackEndType {
         kNativeGL_BackendType,
         kVulkan_BackendType
     };
 
-    virtual bool attach(BackEndTypes attachType, int msaaSampleCount, AttachmentInfo*) = 0;
+    virtual bool attach(BackEndType attachType, int msaaSampleCount, AttachmentInfo*) = 0;
     void detach();
 
     // input handling
     enum Key {
         kNONE_Key,    //corresponds to android's UNKNOWN
 
         kLeftSoftKey_Key,
         kRightSoftKey_Key,
 
         kHome_Key,    //!< the home key - added to match android
@@ skipping 86 matching lines @@
     OnMouseFunc  fMouseFunc;
     void*        fMouseUserData;
     OnPaintFunc  fPaintFunc;
     void*        fPaintUserData;
 
     VulkanTestContext* fTestContext;
 };
 
 
 #endif