Remove deprecated gfx::Image::operator NSImage*().

ui/gfx/image/image.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // An Image wraps an image any flavor, be it platform-native GdkBitmap/NSImage,
 // or a SkBitmap. This also provides easy conversion to other image types
 // through operator overloading. It will cache the converted representations
 // internally to prevent double-conversion.
 //
 // The lifetime of both the initial representation and any converted ones are
@@ skipping 127 matching lines @@
   ImageSkia* CopyImageSkia() const;
   SkBitmap* CopySkBitmap() const;
 #if defined(TOOLKIT_GTK)
   GdkPixbuf* CopyGdkPixbuf() const;
 #elif defined(OS_IOS)
   UIImage* CopyUIImage() const;
 #elif defined(OS_MACOSX)
   NSImage* CopyNSImage() const;
 #endif
 
-  // DEPRECATED ----------------------------------------------------------------
-  // Conversion handlers. These wrap the ToType() variants.
-#if defined(OS_MACOSX) && !defined(OS_IOS)
-  operator NSImage*() const;
-#endif
-  // ---------------------------------------------------------------------------
-
   // Inspects the representations map to see if the given type exists.
   bool HasRepresentation(RepresentationType type) const;
 
   // Returns the number of representations.
   size_t RepresentationCount() const;
 
   // Returns true if this Image has no representations.
   bool IsEmpty() const;
 
   // Swaps this image's internal representations with |other|.
@@ skipping 15 matching lines @@
   // be cheaply copied.
   scoped_refptr<internal::ImageStorage> storage_;
 
   friend class ::ImageTest;
   friend class ::ImageMacTest;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_H_