DO NOT MERGE

cherry-pick https://android-git.corp.google.com/g/#change,29843 from eclair-mr2
This will cherry-pick SHA1: 58def690

This will workaround the following three bugs which are occuring because
the webview DB is getting corrupted:

http://b/issue?id=2338178
http://b/issue?id=2278210
http://b/issue?id=2405650

Here are the comments from the eclair-mr2 CL:

If openOrCreateDatabase() throws an exception, delete
the old db and re-do it. If it still fails, something
bad happens, like the directory may have the different
permission. Let it throw as WebView needs the db.

Fix http://b/issue?id=2179339