Change VkPipelineStateCahce to use Hash and LRU LList.

src/gpu/vk/GrVkResourceProvider.cpp

Index: src/gpu/vk/GrVkResourceProvider.cpp
diff --git a/src/gpu/vk/GrVkResourceProvider.cpp b/src/gpu/vk/GrVkResourceProvider.cpp
index 8bdb946cb8c1b4194486f2865436deed139a5cc0..8bb3911c7623900162bd0b3c9f8243d4a217515f 100644
--- a/src/gpu/vk/GrVkResourceProvider.cpp
+++ b/src/gpu/vk/GrVkResourceProvider.cpp
@@ -96,7 +96,7 @@ GrVkSampler* GrVkResourceProvider::findOrCreateCompatibleSampler(const GrTexture
     return sampler;
 }
 
-GrVkPipelineState* GrVkResourceProvider::findOrCreateCompatiblePipelineState(
+sk_sp<GrVkPipelineState> GrVkResourceProvider::findOrCreateCompatiblePipelineState(
                                                                  const GrPipeline& pipeline,
                                                                  const GrPrimitiveProcessor& proc,
                                                                  GrPrimitiveType primitiveType,