Index8 GPU and CPU raster support.

src/core/SkBitmapDevice.cpp

Index: src/core/SkBitmapDevice.cpp
diff --git a/src/core/SkBitmapDevice.cpp b/src/core/SkBitmapDevice.cpp
index ac3b9df0827ed51aedfb5f5520c7457ced5e7a8a..9cda205776e85f90199a2fe2a39bfb5c360c3d82 100644
--- a/src/core/SkBitmapDevice.cpp
+++ b/src/core/SkBitmapDevice.cpp
@@ -270,7 +270,8 @@ void SkBitmapDevice::drawBitmapRect(const SkDraw& draw, const SkBitmap& bitmap,
 
     // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if
     // needed (if the src was clipped). No check needed if src==null.
-    if (src) {
+    // If bitmapBounds are the same as src, go faster path bellow.
+    if (src && !(bitmapBounds == *src)) {
         if (!bitmapBounds.contains(*src)) {
             if (!tmpSrc.intersect(bitmapBounds)) {
                 return; // nothing to draw