Add support for multi resolution icons

skia/ext/skia_utils_mac.h

Index: skia/ext/skia_utils_mac.h
diff --git a/skia/ext/skia_utils_mac.h b/skia/ext/skia_utils_mac.h
index 05516430190ca625b69e681261d866325d4b2c61..04d4a1d38c671c427eded37dd2d8b39f15ad3251 100644
--- a/skia/ext/skia_utils_mac.h
+++ b/skia/ext/skia_utils_mac.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <CoreGraphics/CGColor.h>
+#include <vector>
 
 #include "third_party/skia/include/core/SkColor.h"
 
@@ -23,8 +24,10 @@ typedef struct _NSSize NSSize;
 
 #ifdef __OBJC__
 @class NSImage;
+@class NSImageRep;
 #else
 class NSImage;
+class NSImageRep;
 #endif
 
 namespace gfx {
@@ -64,6 +67,9 @@ SkBitmap CGImageToSkBitmap(CGImageRef image);
 // Draws an NSImage with a given size into a SkBitmap.
 SkBitmap NSImageToSkBitmap(NSImage* image, NSSize size, bool is_opaque);
 
+// Draws an NSImageRep with a given size into a SkBitmap.
+SkBitmap NSImageRepToSkBitmap(NSImageRep* image, NSSize size, bool is_opaque);
+
 // Given an SkBitmap and a color space, return an autoreleased NSImage.
 NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& icon,
                                          CGColorSpaceRef colorSpace);
@@ -73,6 +79,10 @@ NSImage* SkBitmapToNSImageWithColorSpace(const SkBitmap& icon,
 // TODO(thakis): Remove this -- http://crbug.com/69432
 NSImage* SkBitmapToNSImage(const SkBitmap& icon);
 
+// Given a vector of SkBitmaps, return an NSImage with each bitmap added
+// as a representation.
+NSImage* SkBitmapsToNSImage(const std::vector<const SkBitmap*>& bitmaps);
+
 // Returns |[NSImage imageNamed:@"NSApplicationIcon"]| as SkBitmap.
 SkBitmap AppplicationIconAtSize(int size);