make blitAntiH2 virtual, to prep for larger change

src/core/SkBlitter.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 SkBlitter_DEFINED
 #define SkBlitter_DEFINED
 
+#ifdef SK_SUPPORT_LEGACY_BLITANTIH2V2
+    #define SK_BLITANTIH2V2_VIRTUAL
+#else
+    #define SK_BLITANTIH2V2_VIRTUAL virtual
+#endif
+
 #include "SkBitmap.h"
 #include "SkBitmapProcShader.h"
 #include "SkMask.h"
 #include "SkMatrix.h"
 #include "SkPaint.h"
 #include "SkRefCnt.h"
 #include "SkRegion.h"
 #include "SkShader.h"
 #include "SkSmallAllocator.h"
 
@@ skipping 26 matching lines @@
     /// typically used for text.
     virtual void blitMask(const SkMask&, const SkIRect& clip);
 
     /** If the blitter just sets a single value for each pixel, return the
         bitmap it draws into, and assign value. If not, return NULL and ignore
         the value parameter.
     */
     virtual const SkBitmap* justAnOpaqueColor(uint32_t* value);
 
     // (x, y), (x + 1, y)
-    void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) {
+    SK_BLITANTIH2V2_VIRTUAL void blitAntiH2(int x, int y, U8CPU a0, U8CPU a1) {
         int16_t runs[3];
         uint8_t aa[2];
         
         runs[0] = 1;
         runs[1] = 1;
         runs[2] = 0;
         aa[0] = SkToU8(a0);
         aa[1] = SkToU8(a1);
         this->blitAntiH(x, y, aa, runs);
     }
 
     // (x, y), (x, y + 1)
-    void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) {
+    SK_BLITANTIH2V2_VIRTUAL void blitAntiV2(int x, int y, U8CPU a0, U8CPU a1) {
         int16_t runs[2];
         uint8_t aa[1];
         
         runs[0] = 1;
         runs[1] = 0;
         aa[0] = SkToU8(a0);
         this->blitAntiH(x, y, aa, runs);
         // reset in case the clipping blitter modified runs
         runs[0] = 1;
         runs[1] = 0;
@@ skipping 154 matching lines @@
     SkBlitter*  apply(SkBlitter* blitter, const SkRegion* clip,
                       const SkIRect* bounds = NULL);
 
 private:
     SkNullBlitter       fNullBlitter;
     SkRectClipBlitter   fRectBlitter;
     SkRgnClipBlitter    fRgnBlitter;
 };
 
 #endif