[blimp] Fix theme color in tab switcher

[blimp] Fix theme color in tab switcher

Before the CL https://codereview.chromium.org/2325763003/ landed, it was
possible to use a theme color without alpha for the tab switcher toolbar,
because the code was using the alpha from the underlying resource instead.
However after that CL this was no longer possible and a correct theme color
is required.

The CL that added theme colors to the tab switcher for the new tab page for
blimp tabs ( https://codereview.chromium.org/2325893002/ ) landed around the
same time, and there was no test, so this was not caught in that CL, and it
continued to use a theme color without alpha.

This CL just adds the alpha channel to the theme color from Blimp, which means
that it now propagates correctly throughout the codebase.

BUG=644467, 644774
Committed: https://crrev.com/5f96e9a9fd95d7a9928de17effb1788de5f66691
Cr-Commit-Position: refs/heads/master@{#418078}

[nyquist, 2016-09-12 21:37:42]

nyquist@chromium.org changed reviewers:
+ dtrainor@chromium.org

[nyquist, 2016-09-12 21:37:43]

dtrainor: PTAL

[David Trainor- moved to gerrit, 2016-09-12 21:38:18]

lgtm

[David Trainor- moved to gerrit, 2016-09-12 21:38:23]

The CQ bit was checked by dtrainor@chromium.org

[commit-bot: I haz the power, 2016-09-12 21:39:10]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-12 22:26:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-12 22:28:51]

Description was changed from

==========
[blimp] Fix theme color in tab switcher

Before the CL https://codereview.chromium.org/2325763003/ landed, it was
possible to use a theme color without alpha for the tab switcher toolbar,
because the code was using the alpha from the underlying resource instead.
However after that CL this was no longer possible and a correct theme color
is required.

The CL that added theme colors to the tab switcher for the new tab page for
blimp tabs ( https://codereview.chromium.org/2325893002/ ) landed around the
same time, and there was no test, so this was not caught in that CL, and it
continued to use a theme color without alpha.

This CL just adds the alpha channel to the theme color from Blimp, which means
that it now propagates correctly throughout the codebase.

BUG=644467, 644774
==========

to

==========
[blimp] Fix theme color in tab switcher

Before the CL https://codereview.chromium.org/2325763003/ landed, it was
possible to use a theme color without alpha for the tab switcher toolbar,
because the code was using the alpha from the underlying resource instead.
However after that CL this was no longer possible and a correct theme color
is required.

The CL that added theme colors to the tab switcher for the new tab page for
blimp tabs ( https://codereview.chromium.org/2325893002/ ) landed around the
same time, and there was no test, so this was not caught in that CL, and it
continued to use a theme color without alpha.

This CL just adds the alpha channel to the theme color from Blimp, which means
that it now propagates correctly throughout the codebase.

BUG=644467, 644774

Committed: https://crrev.com/5f96e9a9fd95d7a9928de17effb1788de5f66691
Cr-Commit-Position: refs/heads/master@{#418078}
==========

[commit-bot: I haz the power, 2016-09-12 22:28:52]

Patchset 1 (id:??) landed as
https://crrev.com/5f96e9a9fd95d7a9928de17effb1788de5f66691
Cr-Commit-Position: refs/heads/master@{#418078}