One-time migration of NPAPI Flash to PPAPI Flash.

One-time migration of NPAPI Flash to PPAPI Flash.

Migrate users with PPAPI Flash disabled and NPAPI Flash enabled
to PPAPI Flash for M45.

Clean up some old migration code that wasn't being used any more.

Simplify the system Pepper Flash detection logic.

BUG=510114, 454131
TEST=See bug for detailed manual tests.

Committed: https://crrev.com/d5e116ae533e10d6528c1a55c4e76f64ce11bd3f
Cr-Commit-Position: refs/heads/master@{#340556}

[Will Harris, 2015-07-24 19:56:17]

wfh@chromium.org changed reviewers:
+ bauerb@chromium.org, jam@chromium.org

[Will Harris, 2015-07-24 19:57:43]

PTAL

bauerb -> chrome/browser/plugins/* and plugins_ui.cc
jam -> the other content/ changes

I might ask cpu@ to also give chrome_content_client.cc a once over but
functionality should be identical to before.

[jam, 2015-07-24 20:20:26]

lgtm

[Bernhard Bauer, 2015-07-27 10:08:33]

lgtm

https://codereview.chromium.org/1255943002/diff/1/chrome/browser/plugins/plug...
File chrome/browser/plugins/plugin_prefs.cc (right):

https://codereview.chromium.org/1255943002/diff/1/chrome/browser/plugins/plug...
chrome/browser/plugins/plugin_prefs.cc:333: // M45.
Can you add a TODO to remove this again at a defined point in time?

[Will Harris, 2015-07-27 16:08:36]

Thanks for the review. I'm doing a little bit more manual testing on Mac then I
will CQ.

https://codereview.chromium.org/1255943002/diff/1/chrome/browser/plugins/plug...
File chrome/browser/plugins/plugin_prefs.cc (right):

https://codereview.chromium.org/1255943002/diff/1/chrome/browser/plugins/plug...
chrome/browser/plugins/plugin_prefs.cc:333: // M45.
On 2015/07/27 10:08:33, Bernhard Bauer wrote:
> Can you add a TODO to remove this again at a defined point in time?

Done.

[Will Harris, 2015-07-27 18:57:08]

The CQ bit was checked by wfh@chromium.org

[Will Harris, 2015-07-27 18:57:08]

The patchset sent to the CQ was uploaded after l-g-t-m from bauerb@chromium.org,
jam@chromium.org
Link to the patchset: https://codereview.chromium.org/1255943002/#ps40001
(title: "use correct plugin name on OS X")

[commit-bot: I haz the power, 2015-07-27 18:57:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1255943002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1255943002/40001

[commit-bot: I haz the power, 2015-07-27 20:47:07]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-07-27 20:47:58]

Patchset 3 (id:??) landed as
https://crrev.com/d5e116ae533e10d6528c1a55c4e76f64ce11bd3f
Cr-Commit-Position: refs/heads/master@{#340556}