Implement Vulkan Resolve.

src/gpu/vk/GrVkGpu.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrVkGpu_DEFINED
 #define GrVkGpu_DEFINED
 
@@ skipping 181 matching lines @@
 
     bool onWritePixels(GrSurface* surface,
                        int left, int top, int width, int height,
                        GrPixelConfig config, const SkTArray<GrMipLevel>&) override;
 
     bool onTransferPixels(GrSurface*,
                           int left, int top, int width, int height,
                           GrPixelConfig config, GrBuffer* transferBuffer,
                           size_t offset, size_t rowBytes) override { return false; }
 
-    void onResolveRenderTarget(GrRenderTarget* target) override {}
+    void onResolveRenderTarget(GrRenderTarget* target) override;
 
     // Ends and submits the current command buffer to the queue and then creates a new command
     // buffer and begins it. If sync is set to kForce_SyncQueue, the function will wait for all
     // work in the queue to finish before returning.
     void submitCommandBuffer(SyncQueue sync);
 
     void copySurfaceAsCopyImage(GrSurface* dst,
                                 GrSurface* src,
                                 GrVkImage* dstImage,
                                 GrVkImage* srcImage,
@@ skipping 49 matching lines @@
 #else
     // Shaderc compiler used for compiling glsl in spirv. We only want to create the compiler once
     // since there is significant overhead to the first compile of any compiler.
     shaderc_compiler_t fCompiler;
 #endif
 
     typedef GrGpu INHERITED;
 };
 
 #endif