Revert "Perform Vulkan resets in a background thread"

This reverts commit 30e6343b35c815b58fd8e2b1cd7cb584d13f159c.

Reason for revert: occasional failures

Original change's description:
> Perform Vulkan resets in a background thread
> 
> Bug: skia:
> Change-Id: I90783dc9ac2fcae560cd54e6c8c6df11d7195ac0
> Reviewed-on: https://skia-review.googlesource.com/c/168488
> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
> Reviewed-by: Greg Daniel <egdaniel@google.com>

TBR=egdaniel@google.com,ethannicholas@google.com

Change-Id: Iab0d65331c44fa8976bd35e5efea4b42174836b0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/177061
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/gpu/vk/GrVkPipelineState.cpp b/src/gpu/vk/GrVkPipelineState.cpp
index c639377..9f18b1a 100644
--- a/src/gpu/vk/GrVkPipelineState.cpp
+++ b/src/gpu/vk/GrVkPipelineState.cpp
@@ -75,7 +75,7 @@
     SkASSERT(!fPipelineLayout);
 }
 
-void GrVkPipelineState::freeGPUResources(GrVkGpu* gpu) {
+void GrVkPipelineState::freeGPUResources(const GrVkGpu* gpu) {
     if (fPipeline) {
         fPipeline->unref(gpu);
         fPipeline = nullptr;