Revert "speed up A8 by creating a new entry-point in SkDraw that blits the path's coverage directly…

src/core/SkBlitter_A8.cpp

Index: src/core/SkBlitter_A8.cpp
diff --git a/src/core/SkBlitter_A8.cpp b/src/core/SkBlitter_A8.cpp
index c524d0af0612858214ff0a0a805070bd159ff51d..7fca29ecf5d0c2e31c12b0fe9b01bdceba74d8e6 100644
--- a/src/core/SkBlitter_A8.cpp
+++ b/src/core/SkBlitter_A8.cpp
@@ -347,56 +347,3 @@ void SkA8_Shader_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) {
         alpha += mask.fRowBytes;
     }
 }
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkA8_Coverage_Blitter::SkA8_Coverage_Blitter(const SkBitmap& device,
-                             const SkPaint& paint) : SkRasterBlitter(device) {
-    SkASSERT(NULL == paint.getShader());
-    SkASSERT(NULL == paint.getXfermode());
-    SkASSERT(NULL == paint.getColorFilter());
-}
-
-void SkA8_Coverage_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[],
-                                      const int16_t runs[]) {
-    SkASSERT(0 == x);
-
-    uint8_t* device = fDevice.getAddr8(x, y);
-    SkDEBUGCODE(int totalCount = 0;)
-    
-    for (;;) {
-        int count = runs[0];
-        SkASSERT(count >= 0);
-        if (count == 0) {
-            return;
-        }
-        memset(device, antialias[0], count);
-        runs += count;
-        antialias += count;
-        device += count;
-
-        SkDEBUGCODE(totalCount += count;)
-    }
-    SkASSERT(fDevice.width() == totalCount);
-}
-
-void SkA8_Coverage_Blitter::blitH(int x, int y, int width) {
-    sk_throw();
-}
-
-void SkA8_Coverage_Blitter::blitV(int x, int y, int height, SkAlpha alpha) {
-    sk_throw();
-}
-
-void SkA8_Coverage_Blitter::blitRect(int x, int y, int width, int height) {
-    sk_throw();
-}
-
-void SkA8_Coverage_Blitter::blitMask(const SkMask&, const SkIRect&) {
-    sk_throw();
-}
-
-const SkBitmap* SkA8_Coverage_Blitter::justAnOpaqueColor(uint32_t*) {
-    sk_throw();
-    return NULL;
-}