Fix the errors of ui unittests caused by packing colors for Android

Get the platform-independent result and compare them with the
values of SkColor which is the platform-independent ARGB format

BUG=138933
TEST=run_tests.py -s ui_unittests

Review URL: https://chromiumcodereview.appspot.com/10823012

git-svn-id: http://src.chromium.org/svn/trunk/src/build@150772 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/gtest_filter/ui_unittests_disabled

@@ -25,9 +25,6 @@ FontTest.Height
 FontTest.LoadArial
 FontTest.LoadArialBold
 FontTest.Widths
-ImageTest.CheckSkiaColor
-SkBitmapOperationsTest.CreateHSLShiftedBitmapHueOnly
-SkBitmapOperationsTest.UnPreMultiply
 L10nUtilTest.GetDisplayNameForCountry
 L10nUtilTest.GetDisplayNameForLocale
 ResourceBundle.DelegateGetFont