Fix up -Winconsistent-missing-override

src/utils/debugger/SkDebugCanvas.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkColorPriv.h"
@@ skipping 60 matching lines @@
         if (NULL != fOverdrawXfermode.get()) {
             paint->setAntiAlias(false);
             paint->setXfermode(fOverdrawXfermode.get());
         }
 
         if (fOverrideFilterQuality) {
             paint->setFilterQuality(fFilterQuality);
         }
     }
 
-    void onDrawPicture(const SkPicture* picture, const SkMatrix* matrix, const SkPaint* paint) {
+    void onDrawPicture(const SkPicture* picture,
+                       const SkMatrix* matrix,
+                       const SkPaint* paint) override {
         // We need to replay the picture onto this canvas in order to filter its internal paints.
         this->SkCanvas::onDrawPicture(picture, matrix, paint);
     }
 
 private:
     SkAutoTUnref<SkXfermode> fOverdrawXfermode;
 
     bool fOverrideFilterQuality;
     SkFilterQuality fFilterQuality;
 
@@ skipping 569 matching lines @@
 }
 
 bool SkDebugCanvas::lastClipStackData(const SkPath& devPath) {
     if (fCalledAddStackData) {
         fClipStackData.appendf("<br>");
         addPathData(devPath, "pathOut");
         return true;
     }
     return false;
 }