Use VkPipelineCaches during VkPipeline creation

src/gpu/vk/GrVkPipeline.h

 /*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #ifndef GrVkPipeline_DEFINED
 #define GrVkPipeline_DEFINED
 
@@ skipping 11 matching lines @@
 
 class GrVkPipeline : public GrVkResource {
 public:
     static GrVkPipeline* Create(GrVkGpu* gpu, 
                                 const GrPipeline& pipeline,
                                 const GrPrimitiveProcessor& primProc,
                                 VkPipelineShaderStageCreateInfo* shaderStageInfo,
                                 int shaderStageCount,
                                 GrPrimitiveType primitiveType,
                                 const GrVkRenderPass& renderPass,
-                                VkPipelineLayout layout);
+                                VkPipelineLayout layout,
+                                VkPipelineCache cache);
 
     VkPipeline pipeline() const { return fPipeline; }
 
 private:
     GrVkPipeline(VkPipeline pipeline) : INHERITED(), fPipeline(pipeline) {}
 
     GrVkPipeline(const GrVkPipeline&);
     GrVkPipeline& operator=(const GrVkPipeline&);
 
     void freeGPUData(const GrVkGpu* gpu) const override;
 
     VkPipeline  fPipeline;
 
     typedef GrVkResource INHERITED;
 };
 
 #endif