GitLab

> IndexedDB: Fix cursor prefetching edge cases
> 
> Cursor prefetch caches must be discarded when other
> requests are made to ensure proper request sequencing.
> Two edge cases were handled improperly if new records
> was written just ahead of the cursor.
> 
> * A reset occurring before the prefetch results were
> received would be ignored; since the newly records
> weren't in the prefetch data, the cursor wouldn't see
> them.
> 
> * A reset occurring after the results are received
> would back up the cursor to before the new records,
> even though the prefetch itself is a "continue"
> and advanced past them already.
> 
> The fix is to reset the cache on receipt if necessary,
> and to ensure the reset state accounts for the implicit
> advance.
> 
> BUG=331570
> 
> Review URL: https://codereview.chromium.org/124323002

TBR=jsbell@chromium.org

Review URL: https://codereview.chromium.org/126263003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243359 0039d316-1c4b-4281-b951-d872f2087c98