Add ability to store hidpi theme images in data pack

ui/gfx/image/image_skia_operations.h

Index: ui/gfx/image/image_skia_operations.h
diff --git a/ui/gfx/image/image_skia_operations.h b/ui/gfx/image/image_skia_operations.h
index 1e6a52a66694c6a1735f65f4f9968db518222461..54ba27bdbe390d65d3b703346491704fb1e0b8e3 100644
--- a/ui/gfx/image/image_skia_operations.h
+++ b/ui/gfx/image/image_skia_operations.h
@@ -7,10 +7,12 @@
 
 #include "base/gtest_prod_util.h"
 #include "ui/base/ui_export.h"
+#include "ui/gfx/color_utils.h"
 #include "ui/gfx/shadow_value.h"
 
 namespace gfx {
 class ImageSkia;
+class Rect;
 class Size;
 
 class UI_EXPORT ImageSkiaOperations {
@@ -35,6 +37,24 @@ class UI_EXPORT ImageSkiaOperations {
                                     int src_x, int src_y,
                                     int dst_w, int dst_h);
 
+  // Shift an image's HSL values. The shift values are in the range of 0-1,
+  // with the option to specify -1 for 'no change'. The shift values are
+  // defined as:
+  // hsl_shift[0] (hue): The absolute hue value for the image - 0 and 1 map
+  //    to 0 and 360 on the hue color wheel (red).
+  // hsl_shift[1] (saturation): A saturation shift for the image, with the
+  //    following key values:
+  //    0 = remove all color.
+  //    0.5 = leave unchanged.
+  //    1 = fully saturate the image.
+  // hsl_shift[2] (lightness): A lightness shift for the image, with the
+  //    following key values:
+  //    0 = remove all lightness (make all pixels black).
+  //    0.5 = leave unchanged.
+  //    1 = full lightness (make all pixels white).
+  static ImageSkia CreateHSLShiftedImage(const gfx::ImageSkia& image,
+                                         const color_utils::HSL& hsl_shift);
+
   // Creates an image by resizing |source| to given |target_dip_size|.
   static ImageSkia CreateResizedImage(const ImageSkia& source,
                                       const Size& target_dip_size);
@@ -47,6 +67,6 @@ class UI_EXPORT ImageSkiaOperations {
   ImageSkiaOperations();  // Class for scoping only.
 };
 
-}
+}  // namespace gfx
 
 #endif  // UI_GFX_IMAGE_IMAGE_SKIA_OPERATIONS_H_