Update {virtual,override} to follow C++11 style in src/utils.

src/utils/SkTextBox.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTextBox.h"
 #include "SkUtils.h"
 
@@ skipping 226 matching lines @@
     }
     return y + metrics.fDescent + metrics.fLeading;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class CanvasVisitor : public SkTextBox::Visitor {
     SkCanvas* fCanvas;
 public:
     CanvasVisitor(SkCanvas* canvas) : fCanvas(canvas) {}
-    
-    virtual void operator()(const char text[], size_t length, SkScalar x, SkScalar y,
-                            const SkPaint& paint) override {
+
+    void operator()(const char text[], size_t length, SkScalar x, SkScalar y,
+                    const SkPaint& paint) override {
         fCanvas->drawText(text, length, x, y, paint);
     }
 };
 
 void SkTextBox::setText(const char text[], size_t len, const SkPaint& paint) {
     fText = text;
     fLen = len;
     fPaint = &paint;
 }
 
@@ skipping 15 matching lines @@
     return this->countLines() * spacing;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #include "SkTextBlob.h"
 
 class TextBlobVisitor : public SkTextBox::Visitor {
 public:
     SkTextBlobBuilder fBuilder;
-    
-    virtual void operator()(const char text[], size_t length, SkScalar x, SkScalar y,
-                            const SkPaint& paint) override {
+
+    void operator()(const char text[], size_t length, SkScalar x, SkScalar y,
+                    const SkPaint& paint) override {
         SkPaint p(paint);
         p.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
         const int count = paint.countText(text, length);
         paint.textToGlyphs(text, length, fBuilder.allocRun(p, count, x, y).glyphs);
     }
 };
 
 SkTextBlob* SkTextBox::snapshotTextBlob(SkScalar* computedBottom) const {
     TextBlobVisitor visitor;
     SkScalar newB = this->visit(visitor, fText, fLen, *fPaint);
     if (computedBottom) {
         *computedBottom = newB;
     }
     return (SkTextBlob*)visitor.fBuilder.build();
 }