NOT FOR REVIEW: Aura on Android

ui/gfx/skbitmap_operations.cc

Index: ui/gfx/skbitmap_operations.cc
diff --git a/ui/gfx/skbitmap_operations.cc b/ui/gfx/skbitmap_operations.cc
index cfb44da330b08be71536ded62191cb3f8a8f2478..bccff77c542d34523a685dfb55d0bde49febc082 100644
--- a/ui/gfx/skbitmap_operations.cc
+++ b/ui/gfx/skbitmap_operations.cc
@@ -119,12 +119,10 @@ SkBitmap SkBitmapOperations::CreateMaskedBitmap(const SkBitmap& rgb,
       SkColor alpha_pixel = SkUnPreMultiply::PMColorToColor(alpha_row[x]);
       int alpha = SkAlphaMul(SkColorGetA(rgb_pixel),
                              SkAlpha255To256(SkColorGetA(alpha_pixel)));
-      int alpha_256 = SkAlpha255To256(alpha);
-      dst_row[x] = SkColorSetARGB(alpha,
-                                  SkAlphaMul(SkColorGetR(rgb_pixel), alpha_256),
-                                  SkAlphaMul(SkColorGetG(rgb_pixel), alpha_256),
-                                  SkAlphaMul(SkColorGetB(rgb_pixel),
-                                             alpha_256));
+      dst_row[x] = SkPreMultiplyARGB(alpha,
+                                     SkColorGetR(rgb_pixel),
+                                     SkColorGetG(rgb_pixel),
+                                     SkColorGetB(rgb_pixel));
     }
   }