[sqlite] Annotate Chromium-specific exposed functions with SQLITE_API.

[sqlite] Annotate Chromium-specific exposed functions with SQLITE_API.

SQLITE_API is used to annotate functions exposed across a shlib
boundary.  Annonate our exposed functions.

Also pull the functions added for WebDatabase support so that the blink
implementation can depend on them directly rather than having a local
extern "C" block.

BUG=489444
Committed: https://crrev.com/80d8dda3a4953ffc9f6d87d8a94e74e037d90d5f
Cr-Commit-Position: refs/heads/master@{#344934}

[Scott Hess - ex-Googler, 2015-08-21 21:49:04]

shess@chromium.org changed reviewers:
+ michaeln@chromium.org

[Scott Hess - ex-Googler, 2015-08-21 21:49:04]

The overall set of changes I'm aiming for:
   https://codereview.chromium.org/1312463002/ (browser)
   https://codereview.chromium.org/1308023003/ (blink)

The basic problem is that right now in the component build the sql/ shlib embeds
the sqlite static library.  So if I make sqlite3_* calls from unit tests (for
instance), things break badly because the globals are not shared.  WebDatabase
gets involved because is also embeds sqlite's static library.  If a component
build output uses both sql/ and WebDatabase in the same process, I expect
interesting things to happen.

I think the overall arc comes in three parts, this change, which enables the
blink change above, which enables the balance of the browser change above.  I
_think_ I could land a blink change which hacks in SQLITE_API, then land the
browser change, but then I'd need another blink change to cleanup the hack.  I'd
rather have two browser changes than two blink changes :-).

[michaeln, 2015-08-21 22:40:05]

r/s lgtm

[Scott Hess - ex-Googler, 2015-08-21 22:53:36]

The CQ bit was checked by shess@chromium.org

[commit-bot: I haz the power, 2015-08-21 22:54:14]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1310533005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1310533005/1

[commit-bot: I haz the power, 2015-08-21 23:09:46]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-21 23:09:47]

Try jobs failed on following builders:
  linux_android_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_r...)

[Scott Hess - ex-Googler, 2015-08-21 23:17:34]

The CQ bit was checked by shess@chromium.org

[commit-bot: I haz the power, 2015-08-21 23:18:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1310533005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1310533005/1

[commit-bot: I haz the power, 2015-08-21 23:23:38]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-21 23:23:39]

Try jobs failed on following builders:
  linux_chromium_chromeos_compile_dbg_ng on tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)
  win_chromium_rel_ng on tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[Scott Hess - ex-Googler, 2015-08-21 23:33:10]

The CQ bit was checked by shess@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-08-21 23:34:54]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1310533005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1310533005/1

[commit-bot: I haz the power, 2015-08-22 00:19:04]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-22 00:19:05]

Dry run: This issue passed the CQ dry run.

[Scott Hess - ex-Googler, 2015-08-22 00:21:26]

The CQ bit was checked by shess@chromium.org

[commit-bot: I haz the power, 2015-08-22 00:22:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1310533005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1310533005/1

[commit-bot: I haz the power, 2015-08-22 00:27:49]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-22 00:28:43]

Patchset 1 (id:??) landed as
https://crrev.com/80d8dda3a4953ffc9f6d87d8a94e74e037d90d5f
Cr-Commit-Position: refs/heads/master@{#344934}