Don't make checkdeps ignore includes to directories that are brought in via deps.

Don't make checkdeps ignore includes to directories that are brought in via deps. Most of these are already listed in DEPS files, and it seems that we want to prevent includes on them just like normal directories that are in our tree (otherwise content can depend on native_client, for ex)
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=134296

[brettw, 2012-04-27 17:41:27]

lgtm

Can you add further exposition to the CL description? In a year somebody will
probably ask me why we don't automatically include the deps things and I won't
have any idea.

[jam, 2012-04-27 17:51:37]

On 2012/04/27 17:41:27, brettw wrote:
> lgtm
> 
> Can you add further exposition to the CL description? In a year somebody will
> probably ask me why we don't automatically include the deps things and I won't
> have any idea.

sure