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

src/pipe/SkGPipeWrite.cpp

Index: src/pipe/SkGPipeWrite.cpp
diff --git a/src/pipe/SkGPipeWrite.cpp b/src/pipe/SkGPipeWrite.cpp
index 2537060d2b32fd942819d48a7c8ba566ecfb1147..83e5c57d274b8dd92dafc0ac6bcc4ffbedf1e8a0 100644
--- a/src/pipe/SkGPipeWrite.cpp
+++ b/src/pipe/SkGPipeWrite.cpp
@@ -250,19 +250,19 @@ protected:
     void didSetMatrix(const SkMatrix&) override;
 
     void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
-    virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
-                            const SkPaint&) override;
-    virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
-                               const SkPaint&) override;
-    virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
-                                SkScalar constY, const SkPaint&) override;
-    virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
-                                  const SkMatrix* matrix, const SkPaint&) override;
-    virtual void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
-                                const SkPaint& paint) override;
-    virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
-                             const SkPoint texCoords[4], SkXfermode* xmode,
-                             const SkPaint& paint) override;
+    void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
+                    const SkPaint&) override;
+    void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
+                       const SkPaint&) override;
+    void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
+                        SkScalar constY, const SkPaint&) override;
+    void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
+                          const SkMatrix* matrix, const SkPaint&) override;
+    void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
+                        const SkPaint& paint) override;
+    void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
+                     const SkPoint texCoords[4], SkXfermode* xmode,
+                     const SkPaint& paint) override;
     void onDrawPaint(const SkPaint&) override;
     void onDrawPoints(PointMode, size_t count, const SkPoint pts[], const SkPaint&) override;
     void onDrawRect(const SkRect&, const SkPaint&) override;