Skeleton of SQLite virtual-table module to recover data from corrupt …

…databases.

"recover" implements a virtual table which uses the SQLite pager layer
to read table pages and pull out the data which is structurally sound
(at least at the storage layer).

This CL implements the virtual-table interface, including schema, with
some mock data for purposes of landing some initial tests.  This CL
should cause no changes to Chromium, as it does not get compiled.

BUG=109482
TEST=none

Review URL: http://codereview.chromium.org/9125018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@117359 0039d316-1c4b-4281-b951-d872f2087c98

third_party/sqlite/README.chromium

@@ -189,3 +189,5 @@ Changes from Chrome:
    conflict with an Apple library after amalgamation it was also necessary to
    rename fts3_porter.c's 'cType' to 'vOrCType'.
  - fts3_85522.patch allows fts3 to work if PRAGMA is not authorized.
+ - src/recover.c file implements a virtual table which can read
+   through corruption.