Move most of the component updater artifacts to update_client.

This is a mechanical change. It is large but straightforward in its intention.

jam: please review the changes under //src/chrome/browser

blundell: please review the changes under //src/components

waffles: please review the component updater and the update client changes.

The intention here is to move most of the component updater dependencies to update_client, with the goal of creating an update_client Chrome component that encapsulates the details of talking with the update servers, downloading, and invoking installers of CRXs for both extensions and components.

The dependencies should be: component_updater->update_client.

This change just lays down some of the code that will be further used by update_client. No functionality is provided in this change. Also consider the overall goal as WIP; therefore, some of the naming and dependencies are not final. We want to have most of the code in place for future work, but want to minimize the changes to the existing production code and keep the refactoring mechanical for this change.

BUG=450337
Committed: https://crrev.com/52ac088530b109fa506c4491aea8cf12bcadc63d
Cr-Commit-Position: refs/heads/master@{#312986}

[Sorin Jianu, 2015-01-20 21:06:30]

sorin@chromium.org changed reviewers:
+ blundell@chromium.org, jam@chromium.org, waffles@chromium.org

[Sorin Jianu, 2015-01-20 21:08:24]

jam, blundell: I need owners review please.

Thank you, sorry for the large refactoring and moving code around.

[waffles, 2015-01-20 21:49:07]

lgtm

Overall there are many formatting changes by `git cl format` that I dislike, but
as discussed if we agree to start using the tool we shouldn't have manual
exceptions.

It would be nice if someone a little more knowledgeable than me about GN could
take a look at the .gn files.

https://codereview.chromium.org/808773005/diff/1/components/update_client/bac...
File components/update_client/background_downloader_win.cc (right):

https://codereview.chromium.org/808773005/diff/1/components/update_client/bac...
components/update_client/background_downloader_win.cc:447: this,
&BackgroundDownloader::OnDownloading);
Did git cl format do this? I liked the old format better.

(Same comment elsewhere.)

[jam, 2015-01-21 04:49:26]

chrome/browser (other than component_updater subdir) lgtm

[blundell, 2015-01-21 10:29:04]

//components LGTM outside of changes inside the individual components and their
individual test data

https://codereview.chromium.org/808773005/diff/40001/components/components_te...
File components/components_tests.gyp (right):

https://codereview.chromium.org/808773005/diff/40001/components/components_te...
components/components_tests.gyp:353: # Dependencies of component_updater
there aren't any component_updater unittests now so these dependencies can go
away, right?

[Sorin Jianu, 2015-01-21 18:29:46]

Thank you Colin!

https://codereview.chromium.org/808773005/diff/40001/components/components_te...
File components/components_tests.gyp (right):

https://codereview.chromium.org/808773005/diff/40001/components/components_te...
components/components_tests.gyp:353: # Dependencies of component_updater
On 2015/01/21 10:29:04, blundell wrote:
> there aren't any component_updater unittests now so these dependencies can go
> away, right?

Done.

[Sorin Jianu, 2015-01-21 18:31:43]

The CQ bit was checked by sorin@chromium.org

[commit-bot: I haz the power, 2015-01-21 18:33:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/808773005/60001

[commit-bot: I haz the power, 2015-01-21 18:44:59]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-21 18:45:00]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Sorin Jianu, 2015-01-21 21:52:06]

The CQ bit was checked by sorin@chromium.org

[commit-bot: I haz the power, 2015-01-21 21:53:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/808773005/80001

[commit-bot: I haz the power, 2015-01-21 22:04:15]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-21 22:04:17]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Sorin Jianu, 2015-01-23 23:58:26]

The CQ bit was checked by sorin@chromium.org

[commit-bot: I haz the power, 2015-01-23 23:59:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/808773005/140001

[commit-bot: I haz the power, 2015-01-24 01:15:44]

Committed patchset #8 (id:140001)

[commit-bot: I haz the power, 2015-01-24 01:16:58]

Patchset 8 (id:??) landed as
https://crrev.com/52ac088530b109fa506c4491aea8cf12bcadc63d
Cr-Commit-Position: refs/heads/master@{#312986}