Re-land "Perform Vulkan resets in a background thread"

Bug: skia:
Change-Id: I1c7ec365a370137ca64d9091cb60e6430c3f1c28
Reviewed-on: https://skia-review.googlesource.com/c/177069
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/gpu/vk/GrVkDescriptorPool.h b/src/gpu/vk/GrVkDescriptorPool.h
index 8d77c20..7abf645 100644
--- a/src/gpu/vk/GrVkDescriptorPool.h
+++ b/src/gpu/vk/GrVkDescriptorPool.h
@@ -39,7 +39,7 @@
 #endif
 
 private:
-    void freeGPUData(const GrVkGpu* gpu) const override;
+    void freeGPUData(GrVkGpu* gpu) const override;
 
     VkDescriptorType     fType;
     uint32_t             fCount;