add installPixels

src/core/SkMallocPixelRef.cpp

Index: src/core/SkMallocPixelRef.cpp
diff --git a/src/core/SkMallocPixelRef.cpp b/src/core/SkMallocPixelRef.cpp
index 50357e469bc34571efd012494f5e1c612be30271..c591ffb37d716b163336002b8523e52739e8cb58 100644
--- a/src/core/SkMallocPixelRef.cpp
+++ b/src/core/SkMallocPixelRef.cpp
@@ -238,3 +238,11 @@ SkMallocPixelRef::SkMallocPixelRef(SkFlattenableReadBuffer& buffer)
 
     this->setPreLocked(fStorage, fRB, fCTable);
 }
+
+///////////////////////////////////////////////////////////////////////////////
+
+SkPixelRef* SkMallocPixelRef::PRFactory::create(const SkImageInfo& info,
+                                                SkColorTable* ctable) {
+    return SkMallocPixelRef::NewAllocate(info, info.minRowBytes(), ctable);
+}
+