Define clear regions in terms of GrFixedClip

src/gpu/vk/GrVkGpuCommandBuffer.h

Index: src/gpu/vk/GrVkGpuCommandBuffer.h
diff --git a/src/gpu/vk/GrVkGpuCommandBuffer.h b/src/gpu/vk/GrVkGpuCommandBuffer.h
index 8459e8e32831f45a2f40df3fed8675f6d7b95bcb..506d020371882ef9aeb77f58b2d200d379b2c6aa 100644
--- a/src/gpu/vk/GrVkGpuCommandBuffer.h
+++ b/src/gpu/vk/GrVkGpuCommandBuffer.h
@@ -52,9 +52,9 @@ private:
                 const GrMesh* mesh,
                 int meshCount) override;
 
-    void onClear(GrRenderTarget* rt, const SkIRect& rect, GrColor color) override;
+    void onClear(GrRenderTarget* rt, const GrFixedClip&, GrColor color) override;
 
-    void onClearStencilClip(GrRenderTarget*, const SkIRect& rect, bool insideClip) override;
+    void onClearStencilClip(GrRenderTarget*, const GrFixedClip&, bool insideStencilMask) override;
 
     const GrVkRenderPass*       fRenderPass;
     GrVkSecondaryCommandBuffer* fCommandBuffer;