Add resource tracking output and command buffer recycling

src/gpu/vk/GrVkResource.h

Index: src/gpu/vk/GrVkResource.h
diff --git a/src/gpu/vk/GrVkResource.h b/src/gpu/vk/GrVkResource.h
index 6c08f4ee55c2eee7d29f1ad0dbda2df523afd3a6..d42ec70d765342b7d08876d4406f22187fcad4a4 100644
--- a/src/gpu/vk/GrVkResource.h
+++ b/src/gpu/vk/GrVkResource.h
@@ -15,9 +15,9 @@
 class GrVkGpu;
 
 // uncomment to enable tracing of resource refs
-//#ifdef SK_DEBUG
-//#define SK_TRACE_VK_RESOURCES
-//#endif
+#ifdef SK_DEBUG
+#define SK_TRACE_VK_RESOURCES
+#endif
 
 /** \class GrVkResource
 
@@ -121,6 +121,12 @@ public:
     }
 #endif
 
+#ifdef SK_TRACE_VK_RESOURCES
+    /** Output a human-readable dump of this resource's information
+     */
+    virtual void dumpInfo() const = 0;
+#endif
+
 private:
     /** Must be implemented by any subclasses.
      *  Deletes any Vk data associated with this resource