[ios] Confirm pendingItem in didCommitNavigation matches webView URL.

Don't set a context to committed if the pendingItem doesne't match
the webView URL.

Bug: 931273
Change-Id: Id1a9863a22428262f03159b0f2bc48df051b9463
Reviewed-on: https://chromium-review.googlesource.com/c/1471009
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632247}
1 file changed