Fix Jumplist favicons to have high resolution in HDPI Windows displays

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 97 matching lines @@
                                     size_t input_size);
 
   // Creates an image from the PNG encoded input.
   static Image CreateFrom1xPNGBytes(
       const scoped_refptr<base::RefCountedMemory>& input);
 
   // Converts the Image to the desired representation and stores it internally.
   // The returned result is a weak pointer owned by and scoped to the life of
   // the Image. Must only be called if IsEmpty() is false.
   const SkBitmap* ToSkBitmap() const;
+  const SkBitmap* ToSkBitmap2x() const;
   const ImageSkia* ToImageSkia() const;
 #if defined(OS_IOS)
   UIImage* ToUIImage() const;
 #elif defined(OS_MACOSX)
   NSImage* ToNSImage() const;
 #endif
 
   // Returns the raw PNG-encoded data for the bitmap at 1x. If the data is
   // unavailable, either because the image has no data for 1x or because it is
   // empty, an empty RefCountedBytes object is returned. NULL is never
   // returned.
   scoped_refptr<base::RefCountedMemory> As1xPNGBytes() const;
 
   // Same as ToSkBitmap(), but returns a null SkBitmap if this image is empty.
   SkBitmap AsBitmap() const;
 
+  // Same as ToSkBitmap2x(), but returns a null SkBitmap if this image is empty.
+  SkBitmap AsBitmap2x() const;
+
   // Same as ToImageSkia(), but returns an empty ImageSkia if this
   // image is empty.
   ImageSkia AsImageSkia() const;
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
   // Same as ToSkBitmap(), but returns nil if this image is empty.
   NSImage* AsNSImage() const;
 #endif
 
   // Performs a conversion, like above, but returns a copy of the result rather
@@ skipping 51 matching lines @@
       std::unique_ptr<internal::ImageRep> rep) const;
 
   // Internal class that holds all the representations. This allows the Image to
   // be cheaply copied.
   scoped_refptr<internal::ImageStorage> storage_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_H_