Plugin Power Saver: Improve right-click and middle-click behavior.

Plugin Power Saver: Improve right-click and middle-click behavior.

This patch does two things:

a) Prevent right-click from unthrottling plugins. Always passes it straight to the plugin, so the plugin-native context menu can show. This is useful for verifying whether or not something on the page is Flash, for instance.

b) Prevents middle-click from unthrottling plugins. Continues to consume middle-clicks while the plugin is throttled.

BUG=443406, 403800
Committed: https://crrev.com/9a3381c7761c03a5aba2a7703a759dcc9b8b6d8b
Cr-Commit-Position: refs/heads/master@{#309458}

[tommycli, 2014-12-19 23:06:29]

tommycli@chromium.org changed reviewers:
+ piman@chromium.org

[tommycli, 2014-12-22 15:48:21]

piman: PTAL

thanks!

[piman, 2014-12-22 19:07:28]

lgtm

[tommycli, 2014-12-22 19:09:06]

The CQ bit was checked by tommycli@chromium.org

[tommycli, 2014-12-22 19:09:13]

thank you sir

[commit-bot: I haz the power, 2014-12-22 19:09:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/802453004/1

[commit-bot: I haz the power, 2014-12-22 20:33:37]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-22 20:34:48]

Patchset 1 (id:??) landed as
https://crrev.com/9a3381c7761c03a5aba2a7703a759dcc9b8b6d8b
Cr-Commit-Position: refs/heads/master@{#309458}