exhibit 1: explicit null checks

ui/gfx/image/image.cc

Index: ui/gfx/image/image.cc
diff --git a/ui/gfx/image/image.cc b/ui/gfx/image/image.cc
index 1427d47229a91c12684663d99b6e403cce46829a..8d28eae9ee754cd855197591e9f465f23755befb 100644
--- a/ui/gfx/image/image.cc
+++ b/ui/gfx/image/image.cc
@@ -516,20 +516,6 @@ std::vector<unsigned char>* Image::CopyImagePNG() const {
   return new std::vector<unsigned char>(*ToImagePNG());
 }
 
-SkBitmap Image::AsBitmap() const {
-  return IsEmpty() ? SkBitmap() : *ToSkBitmap();
-}
-
-ImageSkia Image::AsImageSkia() const {
-  return IsEmpty() ? ImageSkia() : *ToImageSkia();
-}
-
-#if defined(OS_MACOSX)
-NSImage* Image::AsNSImage() const {
-  return IsEmpty() ? nil : ToNSImage();
-}
-#endif
-
 ImageSkia* Image::CopyImageSkia() const {
   return new ImageSkia(*ToImageSkia());
 }