Add LargeIconCache and LargeIconServiceFactory for iOS.

skia/ext/skia_utils_ios_unittest.mm

Index: skia/ext/skia_utils_ios_unittest.mm
diff --git a/skia/ext/skia_utils_ios_unittest.mm b/skia/ext/skia_utils_ios_unittest.mm
index 71f46a4e6b349cc751d43ac614d41d65f5a81013..e6dc264f05117fc18f7da59bd6b19bc611092c0a 100644
--- a/skia/ext/skia_utils_ios_unittest.mm
+++ b/skia/ext/skia_utils_ios_unittest.mm
@@ -749,5 +749,16 @@ TEST_F(SkiaUtilsIosTest, Image88x88OrLarger) {
     EXPECT_EQ(1UL, bitmaps.size());
 }
 
+TEST_F(SkiaUtilsIosTest, UIColorFromSkColor) {
+  SkColor color = SkColorSetARGB(50, 100, 150, 200);
+  UIColor* ios_color = gfx::UIColorFromSkColor(color);
+  CGFloat red, green, blue, alpha;
+  [ios_color getRed:&red green:&green blue:&blue alpha:&alpha];
+  EXPECT_EQ(50, (int)(alpha * 255));

[Justin Novosad, 2015/10/30 20:22:04]

To be totally safe with respect to machine precision, you should probably round
instead of truncate the values, and avoid c-style casts.  Something like:
static_cast<int>(alpha * 255 + 0.5f);

+  EXPECT_EQ(100, (int)(red * 255));
+  EXPECT_EQ(150, (int)(green * 255));
+  EXPECT_EQ(200, (int)(blue * 255));
+}
+
 }  // namespace