Fix up all the easy virtual ... SK_OVERRIDE cases.

samplecode/SampleChart.cpp

Index: samplecode/SampleChart.cpp
diff --git a/samplecode/SampleChart.cpp b/samplecode/SampleChart.cpp
index 12a6afe0e3d7ec9e7fcb683645e365bf239169eb..ec5448cc39e59451d59fa913bc79375c7b518ee4 100644
--- a/samplecode/SampleChart.cpp
+++ b/samplecode/SampleChart.cpp
@@ -88,7 +88,7 @@ public:
     }
 
 protected:
-    virtual bool onQuery(SkEvent* evt) SK_OVERRIDE {
+    bool onQuery(SkEvent* evt) SK_OVERRIDE {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "Chart");
             return true;
@@ -96,7 +96,7 @@ protected:
         return this->INHERITED::onQuery(evt);
     }
 
-    virtual void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
+    void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
         bool sizeChanged = false;
         if (canvas->getDeviceSize() != fSize) {
             fSize = canvas->getDeviceSize();