GitLab

Tests added in this CL:
TestLoadAbortChromeExtensionURLWrongPartition
TestLoadAbortIllegalChromeURL
TestLoadAbortIllegalFileURL
TestLoadAbortIllegalJavaScriptURL
TestLoadAbortInvalidNavigation
TestLoadAbortNonWebSafeScheme
TestLoadProgressEvent

BUG=352293

Review URL: https://codereview.chromium.org/601553005

Cr-Commit-Position: refs/heads/master@{#297298}