Add LargeIconCache and LargeIconServiceFactory for iOS.

skia/ext/skia_utils_ios.h

Index: skia/ext/skia_utils_ios.h
diff --git a/skia/ext/skia_utils_ios.h b/skia/ext/skia_utils_ios.h
index 6a854ce6aff408543831fd2755cf163c2606d943..8e1ba9ad7ff24e60b7b5f2e888a348e5dff8c4d5 100644
--- a/skia/ext/skia_utils_ios.h
+++ b/skia/ext/skia_utils_ios.h
@@ -9,11 +9,14 @@
 #include <vector>
 
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkColor.h"
 
 #ifdef __OBJC__
+@class UIColor;
 @class UIImage;
 @class NSData;
 #else
+class UIColor;
 class UIImage;
 class NSData;
 #endif
@@ -35,6 +38,9 @@ SK_API UIImage* SkBitmapToUIImageWithColorSpace(const SkBitmap& skia_bitmap,
 // vector if none can be decoded.
 SK_API std::vector<SkBitmap> ImageDataToSkBitmaps(NSData* image_data);
 
+// Returns a UIColor for an SKColor. Used by iOS downstream.
+SK_API UIColor* UIColorFromSkColor(SkColor color);
+
 }  // namespace gfx
 
 #endif  // SKIA_EXT_SKIA_UTILS_IOS_H_