add rowbytes option to allocPixels

src/lazy/SkCachingPixelRef.cpp

Index: src/lazy/SkCachingPixelRef.cpp
diff --git a/src/lazy/SkCachingPixelRef.cpp b/src/lazy/SkCachingPixelRef.cpp
index 76510f63cd53edca3e5d3571c3a33a78798c784a..97503e5fcc5771eb2add021d663c060d07ec717d 100644
--- a/src/lazy/SkCachingPixelRef.cpp
+++ b/src/lazy/SkCachingPixelRef.cpp
@@ -54,7 +54,7 @@ bool SkCachingPixelRef::onNewLockPixels(LockRec* rec) {
                                                      &bitmap);
     if (NULL == fScaledCacheId) {
         // Cache has been purged, must re-decode.
-        if ((!bitmap.setInfo(info, fRowBytes)) || !bitmap.allocPixels()) {
+        if (!bitmap.allocPixels(info, fRowBytes)) {
             fErrorInDecoding = true;
             return false;
         }