document.close from bool to void

src/xps/SkDocument_XPS.cpp

Index: src/xps/SkDocument_XPS.cpp
diff --git a/src/xps/SkDocument_XPS.cpp b/src/xps/SkDocument_XPS.cpp
index e1222c92bc348ee195a3ccef9220ff17a0358e2c..4a977aeaeeb01f7ae5cfcfbddfed9ed42d017964 100644
--- a/src/xps/SkDocument_XPS.cpp
+++ b/src/xps/SkDocument_XPS.cpp
@@ -49,9 +49,9 @@ protected:
         fDevice.endSheet();
     }
 
-    bool onClose(SkWStream*) override {
+    void onClose(SkWStream*) override {
         SkASSERT(!fCanvas.get());
-        return fDevice.endPortfolio();
+        (void)fDevice.endPortfolio();
     }
 
     void onAbort() override {}