Revert[2] SkDraw and all Blitters to use pixmap instead of bitmapi

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 26b76df9beb1515a2b64987bd2c7726c3cdda1f1..056a4e96d2e0df1802d87424c6149f8f7c93a558 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -271,7 +271,9 @@ public:
             fClip   = &((SkRasterClip*)&rec->fClip)->forceGetBW();
             fRC     = &rec->fClip;
             fDevice = rec->fDevice;
-            fBitmap = &fDevice->accessBitmap(true);
+            if (!fDevice->accessPixels(&fDst)) {
+                fDst.reset(fDevice->imageInfo(), NULL, 0);
+            }
             fPaint  = rec->fPaint;
             SkDEBUGCODE(this->validate();)