Revert of Extend contextMenus API to support browser/page actions

Revert of Extend contextMenus API to support browser/page actions (https://codereview.chromium.org/359493005/)

Reason for revert:
This adds two new static initializers, and breaks the perf bot.

See http://build.chromium.org/p/chromium/builders/Linux%20x64

Good: 
http://build.chromium.org/p/chromium/builders/Linux%20x64/builds/68460

Bad:
http://build.chromium.org/p/chromium/builders/Linux%20x64/builds/68461

# Static initializers in src/out/Release/chrome:
...
# context_menu_matcher.cc extensions::(anonymous namespace)::action_menu_top_level_limit
# context_menu_matcher.cc __init_array_end+0xd950
...
# Found 36 static initializers in 8 files.

Original issue's description:
> Extend contextMenus API to support browser/page actions
> 
> Screenshot:
> http://i.imgur.com/RILqQqe.png
> 
> BUG=234425
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=288418

[tommycli, 2014-08-08 20:30:43]

Created Revert of Extend contextMenus API to support browser/page actions

[commit-bot: I haz the power, 2014-08-08 20:33:12]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/tommycli@chromium.org/459493002/1

[commit-bot: I haz the power, 2014-08-08 20:33:13]

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

[commit-bot: I haz the power, 2014-08-08 20:33:14]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Yoyo Zhou, 2014-08-08 20:51:09]

FYI, luken@ reverted this already.