IndexedDB: Eliminate IndexedDBDatabaseCallbacksWrapper

IndexedDB: Eliminate IndexedDBDatabaseCallbacksWrapper

The wrapper class was introduced to provide a refcounted wrapper around
a non-refcounted object during the migration from Blink. Collapse the
two types into one.

BUG=234278
R=alecflett@chromium.org, jam@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=209486

[jsbell, 2013-06-28 18:36:10]

More wrapper type elimination. This will make the elimination of
WebIDBDatabaseImpl easier.

Locally, I have this stacked on top of https://codereview.chromium.org/18145004/
but it may apply to ToT. If the bots turn red, I guess not.

[jsbell, 2013-06-28 18:45:59]

+dgrogan as reviewer

[jam, 2013-06-28 22:16:50]

gypi lgtm

[alecflett, 2013-06-29 00:01:10]

lgtm

[commit-bot: I haz the power, 2013-07-01 16:14:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jsbell@chromium.org/18224002/8001

[commit-bot: I haz the power, 2013-07-01 17:35:48]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win&number...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-07-01 18:35:21]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/jsbell@chromium.org/18224002/29001

[commit-bot: I haz the power, 2013-07-01 19:51:51]

Retried try job too often on win_rel for step(s) interactive_ui_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[jsbell, 2013-07-01 20:21:39]

Committed patchset #4 manually as r209486 (presubmit successful).