only notify bitmaps that have been added to the cache

src/lazy/SkCachingPixelRef.cpp

Index: src/lazy/SkCachingPixelRef.cpp
diff --git a/src/lazy/SkCachingPixelRef.cpp b/src/lazy/SkCachingPixelRef.cpp
index 570fc6fbd78a5d75edc69d56a6bb85a673e4c375..dc53a5d6c78c7cf651f545a32482d23500d78633 100644
--- a/src/lazy/SkCachingPixelRef.cpp
+++ b/src/lazy/SkCachingPixelRef.cpp
@@ -63,8 +63,7 @@ bool SkCachingPixelRef::onNewLockPixels(LockRec* rec) {
                 return false;
         }
         fLockedBitmap.setImmutable();
-        SkBitmapCache::Add(
-                this->getGenerationID(), info.bounds(), fLockedBitmap);
+        SkBitmapCache::Add(this, info.bounds(), fLockedBitmap);
     }
 
     // Now bitmap should contain a concrete PixelRef of the decoded image.