Revert of change SkDraw and all Blitters to use pixmap instead of bitmap

src/gpu/GrAADistanceFieldPathRenderer.cpp

Index: src/gpu/GrAADistanceFieldPathRenderer.cpp
diff --git a/src/gpu/GrAADistanceFieldPathRenderer.cpp b/src/gpu/GrAADistanceFieldPathRenderer.cpp
index 3c7648aae342ed24368c4665eb6dc470433ae03a..21fbcb37fbc4cc0fb240f4e85d2c203763ec8072 100755
--- a/src/gpu/GrAADistanceFieldPathRenderer.cpp
+++ b/src/gpu/GrAADistanceFieldPathRenderer.cpp
@@ -354,12 +354,14 @@
         SkIRect pathBounds = SkIRect::MakeWH(devPathBounds.width(),
                                              devPathBounds.height());
 
-        SkAutoPixmapStorage dst;
-        if (!dst.tryAlloc(SkImageInfo::MakeA8(pathBounds.width(),
-                                              pathBounds.height()))) {
+        SkBitmap bmp;
+        const SkImageInfo bmImageInfo = SkImageInfo::MakeA8(pathBounds.fRight,
+                                                            pathBounds.fBottom);
+        if (!bmp.tryAllocPixels(bmImageInfo)) {
             return false;
         }
-        sk_bzero(dst.writable_addr(), dst.getSafeSize());
+
+        sk_bzero(bmp.getPixels(), bmp.getSafeSize());
 
         // rasterize path
         SkPaint paint;
@@ -386,7 +388,7 @@
         draw.fRC = &rasterClip;
         draw.fClip = &rasterClip.bwRgn();
         draw.fMatrix = &drawMatrix;
-        draw.fDst = dst;
+        draw.fBitmap = &bmp;
 
         draw.drawPathCoverage(path, paint);
 
@@ -398,9 +400,13 @@
         SkAutoSMalloc<1024> dfStorage(width * height * sizeof(unsigned char));
 
         // Generate signed distance field
-        SkGenerateDistanceFieldFromA8Image((unsigned char*)dfStorage.get(),
-                                           (const unsigned char*)dst.addr(),
-                                           dst.width(), dst.height(), dst.rowBytes());
+        {
+            SkAutoLockPixels alp(bmp);
+
+            SkGenerateDistanceFieldFromA8Image((unsigned char*)dfStorage.get(),
+                                               (const unsigned char*)bmp.getPixels(),
+                                               bmp.width(), bmp.height(), bmp.rowBytes());
+        }
 
         // add to atlas
         SkIPoint16 atlasLocation;