Move history extension API implementation to history dir.

Move history extension API implementation to history dir.

We're moving all the extension api implementations out of
browser/extensions into the directory with the code they are
automating.

BUG=101244
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=106968

[Aaron Boodman, 2011-10-22 06:07:57]

Also move constants into history_extension_api.cc. The reason we originally
needed to do this no longer applies.

[brettw, 2011-10-24 16:32:36]

lgtm

[commit-bot: I haz the power, 2011-10-24 18:29:08]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/aa@chromium.org/8372021/2002

[commit-bot: I haz the power, 2011-10-24 18:29:24]

Can't apply patch for file
chrome/browser/extensions/extension_function_dispatcher.cc.
While running patch -p1 --forward --force;
patching file chrome/browser/extensions/extension_function_dispatcher.cc
Hunk #1 succeeded at 26 with fuzz 1.
Hunk #2 FAILED at 55.
1 out of 2 hunks FAILED -- saving rejects to file
chrome/browser/extensions/extension_function_dispatcher.cc.rej

[commit-bot: I haz the power, 2011-10-24 18:58:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/aa@chromium.org/8372021/8001

[commit-bot: I haz the power, 2011-10-24 20:29:13]

Change committed as 106968