Adding native client toolchain download to all chrome checkouts with nacl.

Adding native client toolchain download to all chrome checkouts with nacl.
This will eventually allow ppapi_proxy + irt to be built along with chrome,
allow repository migration.

Step2 of ppapi repo migration.

BUG=None
TEST=None
R=noelallen@google.com,brettw@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=97242
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=97260

[noelallen_use_chromium, 2011-08-17 01:39:45]

LGTM.  Just a couple nits.

http://codereview.chromium.org/7670019/diff/1003/build/download_nacl_toolchai...
File build/download_nacl_toolchains.py (right):

http://codereview.chromium.org/7670019/diff/1003/build/download_nacl_toolchai...
build/download_nacl_toolchains.py:13: script_dir =
os.path.dirname(os.path.abspath(__file__))
Std convention is to call main, and make this it's own def.

http://codereview.chromium.org/7670019/diff/1003/build/download_nacl_toolchai...
build/download_nacl_toolchains.py:19: print 'No native_client directory,
skipping toolchain download.'
Plz change to '%s' does not exist and print the file name.

[brettw, 2011-08-17 02:20:16]

LGTM

[bradn, 2011-08-17 02:26:25]

http://codereview.chromium.org/7670019/diff/1003/build/download_nacl_toolchai...
File build/download_nacl_toolchains.py (right):

http://codereview.chromium.org/7670019/diff/1003/build/download_nacl_toolchai...
build/download_nacl_toolchains.py:13: script_dir =
os.path.dirname(os.path.abspath(__file__))
On 2011/08/17 01:39:45, noelallen wrote:
> Std convention is to call main, and make this it's own def.

Done.

http://codereview.chromium.org/7670019/diff/1003/build/download_nacl_toolchai...
build/download_nacl_toolchains.py:19: print 'No native_client directory,
skipping toolchain download.'
On 2011/08/17 01:39:45, noelallen wrote:
> Plz change to '%s' does not exist and print the file name.

Done.

[commit-bot: I haz the power, 2011-08-18 00:03:18]

Change committed as 97242