Move the Linux zygote stuff into its own per-process directory.

Move the Linux zygote stuff into its own per-process directory.

The zygote is really a separate process and doesn't belong in the browser
subdirectory. I separated out the common constants used for communication into
content/[public/]/common so the zygote code doesn't depend on browser.

This leaves zygote_main_linux alone in its own directory. I'm going to be doing
some more refactoring and probably adding a new file or two here. This does
not yet add a new build target for the zygot process.

BUG=
TEST=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=135891

[brettw, 2012-05-07 20:25:59]

https://chromiumcodereview.appspot.com/10388013/diff/1/content/app/content_ma...
File content/app/content_main_runner.cc (right):

https://chromiumcodereview.appspot.com/10388013/diff/1/content/app/content_ma...
content/app/content_main_runner.cc:83: namespace content {
I added this function to the content namespace since we're moving other stuff,
although now it makes this file look a bit strange without the other stuff
moved.

[Avi (use Gerrit), 2012-05-08 18:17:55]

lgtm

[brettw, 2012-05-08 19:28:36]

TBR ben: chrome/ui, jam: content/app.

[Ben Goodger (Google), 2012-05-08 19:30:14]

lgtm