Enable ProfileAttributesStorageTest.LoadAvatarFromDiskTest on Linux ASAN

The captioned test is now fixed, so we enable the test again.
This is a revert of https://chromium-review.googlesource.com/827006.

Bug: 794821
Change-Id: Icabf8e2fed02d0b2c3220af7e1a1001afbaadbfd
Reviewed-on: https://chromium-review.googlesource.com/883821Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Bernhard Bauer <bauerb@chromium.org>
Commit-Queue: Bernhard Bauer <bauerb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532034}

chrome/browser/profiles/profile_attributes_storage_unittest.cc

@@ -791,14 +791,7 @@ TEST_F(ProfileAttributesStorageTest, NothingToDownloadHighResAvatarTest) {
   EXPECT_EQ(0U, storage()->avatar_images_downloads_in_progress_.size());
 }
 
-// Flaky on Linux ASAN. http://crbug.com/794821.
-#if defined(OS_LINUX) && defined(ADDRESS_SANITIZER)
-#define MAYBE_LoadAvatarFromDiskTest DISABLED_LoadAvatarFromDiskTest
-#else
-#define MAYBE_LoadAvatarFromDiskTest LoadAvatarFromDiskTest
-#endif
-
-TEST_F(ProfileAttributesStorageTest, MAYBE_LoadAvatarFromDiskTest) {
+TEST_F(ProfileAttributesStorageTest, LoadAvatarFromDiskTest) {
   const size_t kIconIndex = 0;
   base::FilePath icon_path =
       profiles::GetPathOfHighResAvatarAtIndex(kIconIndex);