Make drawText calls non-virtual, to ease SkFont and TextBlob (https://codereview.chromium.org/24385…

experimental/PdfViewer/SkNulCanvas.h

Index: experimental/PdfViewer/SkNulCanvas.h
diff --git a/experimental/PdfViewer/SkNulCanvas.h b/experimental/PdfViewer/SkNulCanvas.h
index 1c31e9d39ce7e094f81f819032b4b5313b1575db..f2befad34442c04fc61ee9419d8301cc687d686c 100644
--- a/experimental/PdfViewer/SkNulCanvas.h
+++ b/experimental/PdfViewer/SkNulCanvas.h
@@ -47,16 +47,6 @@ public:
                                 const SkRect& dst, const SkPaint* paint = NULL) SK_OVERRIDE {}
     virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
                             const SkPaint* paint = NULL) SK_OVERRIDE {}
-    virtual void drawText(const void* text, size_t byteLength, SkScalar x,
-                          SkScalar y, const SkPaint& paint) SK_OVERRIDE {}
-    virtual void drawPosText(const void* text, size_t byteLength,
-                             const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE {}
-    virtual void drawPosTextH(const void* text, size_t byteLength,
-                              const SkScalar xpos[], SkScalar constY,
-                              const SkPaint& paint) SK_OVERRIDE {}
-    virtual void drawTextOnPath(const void* text, size_t byteLength,
-                                const SkPath& path, const SkMatrix* matrix,
-                                const SkPaint& paint) SK_OVERRIDE {}
     virtual void drawPicture(SkPicture& picture) SK_OVERRIDE {}
     virtual void drawVertices(VertexMode vmode, int vertexCount,
                               const SkPoint vertices[], const SkPoint texs[],
@@ -99,6 +89,17 @@ protected:
         return kNoLayer_SaveLayerStrategy;
     }
 
+    virtual void onDrawText(const void* text, size_t byteLength, SkScalar x,
+                          SkScalar y, const SkPaint& paint) SK_OVERRIDE {}
+    virtual void onDrawPosText(const void* text, size_t byteLength,
+                             const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE {}
+    virtual void onDrawPosTextH(const void* text, size_t byteLength,
+                              const SkScalar xpos[], SkScalar constY,
+                              const SkPaint& paint) SK_OVERRIDE {}
+    virtual void onDrawTextOnPath(const void* text, size_t byteLength,
+                                const SkPath& path, const SkMatrix* matrix,
+                                const SkPaint& paint) SK_OVERRIDE {}
+
     virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
     virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
     virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}