X87: [runtime] Initial step towards switching Execution::Call to callable.

X87: [runtime] Initial step towards switching Execution::Call to callable.

port d5bbd45f044ae6796c0d0f7bd8732069d74418de (r30808).

oringial commit message:

    Currently Execution::Call (and friends) still duplicate a lot of the
    Call sequence logic that should be encapsulated in the Call and
    CallFunction builtins. So the plan now is to switch Execution::Call
    to accept any Callable and just pass that through to the Call builtin.

BUG=

Committed: https://crrev.com/e8ec4ede62e40e685687840c83d119dbe98dd2e1
Cr-Commit-Position: refs/heads/master@{#30828}

[chunyang.dai, 2015-09-18 07:17:04]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-09-18 07:17:04]

PTAL

[Weiliang, 2015-09-18 11:22:07]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-09-18 11:22:08]

lgtm

[commit-bot: I haz the power, 2015-09-18 11:22:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1350183005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1350183005/1

[commit-bot: I haz the power, 2015-09-18 11:59:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-18 11:59:52]

Patchset 1 (id:??) landed as
https://crrev.com/e8ec4ede62e40e685687840c83d119dbe98dd2e1
Cr-Commit-Position: refs/heads/master@{#30828}