Use ContextMenu code path that was guarded by CROSS_PLATFORM_CONTEXT_MENU

Use ContextMenu code path that was guarded by CROSS_PLATFORM_CONTEXT_MENU

Here this flag is also removed and functions related to selecting
an item now receive a const ContextMenuItem*, cleaning up a few
const_cast.

BUG=

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=148457

[abarth-chromium, 2013-04-11 20:52:18]

lgtm

[commit-bot: I haz the power, 2013-04-11 20:57:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/forgerbr@gmail.com/14185003/1

[Julien - ping for review, 2013-04-11 21:01:34]

Jeez didn't sign the CLA so holding off on landing the change, but I agree that
it should get in.

[abarth-chromium, 2013-04-11 21:02:54]

Oh, sorry.  We need an automated way to check that.

[Julien - ping for review, 2013-04-11 21:22:57]

On 2013/04/11 21:02:54, abarth wrote:
> Oh, sorry.  We need an automated way to check that.

I agree, it's really difficult for us to know that. On top of that the procedure
is to add people to Chromium's AUTHORS when they land their first patch which is
outside Blink.

Double-checked that jeez signed the CLA.

[commit-bot: I haz the power, 2013-04-11 21:23:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/forgerbr@gmail.com/14185003/1

[eseidel, 2013-04-11 21:24:02]

Enforcing the CLA w/o automation is impractical/impossible.
https://code.google.com/p/chromium/issues/detail?id=230038

[commit-bot: I haz the power, 2013-04-11 21:31:44]

Sorry for I got bad news for ya.
Compile failed with a clobber build on mac_layout_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=mac_layout...
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, 2013-04-12 00:41:47]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/forgerbr@gmail.com/14185003/1

[jeez, 2013-04-12 02:56:10]

On 2013/04/12 00:41:47, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
> https://chromium-status.appspot.com/cq/forgerbr%40gmail.com/14185003/1

I'm not sure what might be going wrong here. None of the CQ build failures so
far seem related to this patch...

[commit-bot: I haz the power, 2013-04-12 03:45:02]

Sorry for I got bad news for ya.
Compile failed with a clobber build on win_layout_rel.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_layout...
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.

[jochen (gone - plz use gerrit), 2013-04-16 11:00:22]

Committed patchset #2 manually as r148457 (presubmit successful).