Skip updating jumplist icons if creation of folder JumplistIcons fails

According to UMA, 0.14% of jumplist IO operations fail to create folder
JumplistIcons after its successful deletion for unknown reasons. This
could impact roughly 0.14% Chrome users. In this case, updating jumplist
icons is meaningless and should be skipped.

BUG=40407, 179576

Review-Url: https://codereview.chromium.org/2739683003
Cr-Commit-Position: refs/heads/master@{#455489}
1 file changed