Add GrVkRecycledResource subclass

src/gpu/vk/GrVkCommandBuffer.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 GrVkCommandBuffer_DEFINED
 #define GrVkCommandBuffer_DEFINED
 
@@ skipping 99 matching lines @@
               uint32_t firstVertex,
               uint32_t firstInstance) const;
 
     // Add ref-counted resource that will be tracked and released when this
     // command buffer finishes execution
     void addResource(const GrVkResource* resource) {
         resource->ref();
         fTrackedResources.push_back(resource);
     }
 
+    // Add ref-counted resource that will be tracked and released when this command buffer finishes
+    // execution. When it is released, it will signal that the resource can be recycled for reuse.
+    void addRecycledResource(const GrVkRecycledResource* resource) {
+        resource->ref();
+        fTrackedRecycledResources.push_back(resource);
+    }
+
     void reset(GrVkGpu* gpu);
 
 protected:
         GrVkCommandBuffer(VkCommandBuffer cmdBuffer, const GrVkRenderPass* rp = VK_NULL_HANDLE)
             : fTrackedResources(kInitialTrackedResourcesCount)
+            , fTrackedRecycledResources(kInitialTrackedResourcesCount)
             , fIsActive(false)
             , fActiveRenderPass(rp)
             , fCmdBuffer(cmdBuffer)
             , fBoundVertexBufferIsValid(false)
             , fBoundIndexBufferIsValid(false) {
             this->invalidateState();
         }
-        SkTArray<const GrVkResource*, true>     fTrackedResources;
+        SkTArray<const GrVkResource*, true>          fTrackedResources;
+        SkTArray<const GrVkRecycledResource*, true>  fTrackedRecycledResources;
 
         // Tracks whether we are in the middle of a command buffer begin/end calls and thus can add
         // new commands to the buffer;
         bool fIsActive;
 
         // Stores a pointer to the current active render pass (i.e. begin has been called but not
         // end). A nullptr means there is no active render pass. The GrVKCommandBuffer does not own
         // the render pass.
         const GrVkRenderPass*     fActiveRenderPass;
 
@@ skipping 162 matching lines @@
     }
 
     void onFreeGPUData(const GrVkGpu* gpu) const override {}
 
     friend class GrVkPrimaryCommandBuffer;
 
     typedef GrVkCommandBuffer INHERITED;
 };
 
 #endif