Fix up -Winconsistent-missing-override

samplecode/SampleLines.cpp

Index: samplecode/SampleLines.cpp
diff --git a/samplecode/SampleLines.cpp b/samplecode/SampleLines.cpp
index 4b491a516fb7b9b85400082a828a30657385a732..0166bc029691ae44c8324fe45169e515d789e7a2 100644
--- a/samplecode/SampleLines.cpp
+++ b/samplecode/SampleLines.cpp
@@ -34,7 +34,7 @@ public:
 
 protected:
     // overrides from SkEventSink
-    virtual bool onQuery(SkEvent* evt) {
+    bool onQuery(SkEvent* evt) override {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "Lines");
             return true;
@@ -62,7 +62,7 @@ protected:
         canvas->drawRect(r, paint);
     }
 
-    virtual void onDrawContent(SkCanvas* canvas) {
+    void onDrawContent(SkCanvas* canvas) override {
         SkBitmap bm;
         SkImageDecoder::DecodeFile("/kill.gif", &bm);
         canvas->drawBitmap(bm, 0, 0, NULL);