remove unused drawData

include/core/SkCanvas.h

 /*
  * 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.
  */
 
 #ifndef SkCanvas_DEFINED
 #define SkCanvas_DEFINED
 
@@ skipping 999 matching lines @@
                     their order is the same as the colors.
      @param xmode specifies how are the colors and the textures combined if both of them are
                     present.
      @param paint Specifies the shader/texture if present.
      */
     void drawPatch(const SkPoint cubics[12], const SkColor colors[4],
                    const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint);
 
     void EXPERIMENTAL_drawDrawable(SkCanvasDrawable*);
 
+#ifdef SK_SUPPORT_LEGACY_DRAWDATA
     /** Send a blob of data to the canvas.
         For canvases that draw, this call is effectively a no-op, as the data
         is not parsed, but just ignored. However, this call exists for
         subclasses like SkPicture's recording canvas, that can store the data
         and then play it back later (via another call to drawData).
      */
-    virtual void drawData(const void* /*data*/, size_t /*length*/) {
-        // do nothing. Subclasses may do something with the data
-    }
+    virtual void drawData(const void* /*data*/, size_t /*length*/) {}
+#endif
 
     /** Add comments. beginCommentGroup/endCommentGroup open/close a new group.
         Each comment added via addComment is notionally attached to its
         enclosing group. Top-level comments simply belong to no group.
      */
     virtual void beginCommentGroup(const char* /*description*/) {
         // do nothing. Subclasses may do something
     }
     virtual void addComment(const char* /*kywd*/, const char* /*value*/) {
         // do nothing. Subclasses may do something
@@ skipping 443 matching lines @@
 
 class SkCanvasClipVisitor {
 public:
     virtual ~SkCanvasClipVisitor();
     virtual void clipRect(const SkRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipRRect(const SkRRect&, SkRegion::Op, bool antialias) = 0;
     virtual void clipPath(const SkPath&, SkRegion::Op, bool antialias) = 0;
 };
 
 #endif