Create free list heap for suballocation

src/gpu/vk/GrVkBuffer.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrVkBuffer_DEFINED
 #define GrVkBuffer_DEFINED
 
@@ skipping 36 matching lines @@
 
 protected:
     struct Desc {
         size_t      fSizeInBytes;
         Type        fType;         // vertex buffer, index buffer, etc.
         bool        fDynamic;
     };
 
     class Resource : public GrVkResource {
     public:
-        Resource(VkBuffer buf, const GrVkAlloc& alloc) 
-            : INHERITED(), fBuffer(buf), fAlloc(alloc) {}
+        Resource(VkBuffer buf, const GrVkAlloc& alloc, Type type)
+            : INHERITED(), fBuffer(buf), fAlloc(alloc), fType(type) {}
 
-        VkBuffer  fBuffer;
-        GrVkAlloc fAlloc;
+        VkBuffer           fBuffer;
+        GrVkAlloc          fAlloc;
+        Type               fType;
 
     private:
         void freeGPUData(const GrVkGpu* gpu) const;
 
         typedef GrVkResource INHERITED;
     };
 
     // convenience routine for raw buffer creation
     static const Resource* Create(const GrVkGpu* gpu,
                                   const Desc& descriptor);
@@ skipping 17 matching lines @@
     bool vkIsMapped() const;
 
     Desc                    fDesc;
     const Resource*         fResource;
     void*                   fMapPtr;
 
     typedef SkNoncopyable INHERITED;
 };
 
 #endif