Use a single cros_toolchain tarball for ChromeOS build

Use a single cros_toolchain tarball for ChromeOS build

It's stored in our GS bucket, so we won't need two sets of credentials.

BUG=

[borenet, 2013-06-21 20:22:32]

https://codereview.chromium.org/17341011/diff/2001/gyp/common.gypi
File gyp/common.gypi (left):

https://codereview.chromium.org/17341011/diff/2001/gyp/common.gypi#oldcode44
gyp/common.gypi:44: 'error': '<!(skia_cros_target must be defined for
ChromeOS)',
No longer needed.

https://codereview.chromium.org/17341011/diff/2001/platform_tools/chromeos/bi...
File platform_tools/chromeos/bin/chromeos_make (left):

https://codereview.chromium.org/17341011/diff/2001/platform_tools/chromeos/bi...
platform_tools/chromeos/bin/chromeos_make:43: # Obtain some extra headers and
libraries if needed.
These have been merged into a single tarball.

[djsollen, 2013-06-24 18:46:52]

lgtm

https://codereview.chromium.org/17341011/diff/2001/platform_tools/chromeos/bi...
File platform_tools/chromeos/bin/chromeos_make (right):

https://codereview.chromium.org/17341011/diff/2001/platform_tools/chromeos/bi...
platform_tools/chromeos/bin/chromeos_make:49: if ! [[ -d
"${CHROMEOS_CHROOT}/.cros_cache" ]]; then
is that dir always in the chroot?

[borenet, 2013-06-24 18:48:51]

https://codereview.chromium.org/17341011/diff/2001/platform_tools/chromeos/bi...
File platform_tools/chromeos/bin/chromeos_make (right):

https://codereview.chromium.org/17341011/diff/2001/platform_tools/chromeos/bi...
platform_tools/chromeos/bin/chromeos_make:49: if ! [[ -d
"${CHROMEOS_CHROOT}/.cros_cache" ]]; then
On 2013/06/24 18:46:52, djsollen wrote:
> is that dir always in the chroot?

That's where the chrome-sdk tool stores everything it downloads.  The chroot
itself is actually inside that directory.

[borenet, 2013-06-24 19:30:58]

Moved to https://codereview.chromium.org/17608003/ since my checkout is
apparently broken.