Revert of Revert of Eliminate components_unittests' dependence on chrome resources.

Revert of Revert of Eliminate components_unittests' dependence on chrome resources. (patchset #1 id:1 of https://codereview.chromium.org/867473002/)

Reason for revert:
i'll disable the test on asan. reverting this will break other things.

Original issue's description:
> Revert of Eliminate components_unittests' dependence on chrome resources. (patchset #8 id:180001 of https://codereview.chromium.org/856163002/)
>
> Reason for revert:
> Causes Mac ASAN bot to fail on BookmarkModelTest.Sort. The failures look the same as those referenced in crbug.com/450464.
>
> https://build.chromium.org/p/chromium.memory/builders/Mac%20ASan%2064%20Tests%20%281%29/builds/6320
>
> Original issue's description:
> > Eliminate components_unittests' dependence on chrome resources.
> >
> > This CL changes components_unittests to create its own pakfile rather than
> > relying on the chrome pakfile. To do this it adds a repack step that repacks
> > the pakfiles that components_unittests needs into a
> > components_unittests_resources.pak file, and then loads that pakfile
> > explicitly.
> >
> > This change means that components_unittests now passes after a clean build,
> > whereas before it would fail due to missing resources.
> >
> > This is based on blundell's change: https://codereview.chromium.org/258043003/
> >
> > BUG=348563, 450464
> > R=blundell@chromium.org, thakis@chromium.org
> >
> > Committed: https://chromium.googlesource.com/chromium/src/+/045c9bf1d36f35643a077891dedf24054f2032a3
> >
> > Committed: https://chromium.googlesource.com/chromium/src/+/e98e8e7654b7e51f98e92514897f8e1284eaa571
>
> TBR=blundell@chromium.org,thakis@chromium.org,maruel@chromium.org,jam@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=348563, 450464
>
> Committed: https://crrev.com/a2e3cc7a3586e7a27b414c47ae4db3d10efe40ba
> Cr-Commit-Position: refs/heads/master@{#312490}

TBR=blundell@chromium.org,thakis@chromium.org,maruel@chromium.org,chrishtr@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=348563, 450464
Committed: https://crrev.com/6bb3c8f170c0f59873ba2ce1a13e0be7a380da46
Cr-Commit-Position: refs/heads/master@{#312507}

[jam, 2015-01-22 00:40:55]

Created Revert of Revert of Eliminate components_unittests' dependence on chrome
resources.

[commit-bot: I haz the power, 2015-01-22 00:42:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/866643002/1

[commit-bot: I haz the power, 2015-01-22 00:44:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-22 00:47:00]

Patchset 1 (id:??) landed as
https://crrev.com/6bb3c8f170c0f59873ba2ce1a13e0be7a380da46
Cr-Commit-Position: refs/heads/master@{#312507}

[M-A Ruel, 2015-01-22 00:47:30]

trololo lgtm