Fix BrowserActionContainer chevron visibility regression

Fix BrowserActionContainer chevron visibility regression

https://codereview.chromium.org/476873002 introduced a regression where
shrinking the size of the extensions toolbar to 0 would not show the chevron
anymore.  Fix the regression, and add a test so it doesn't happen again.

BUG=407134
Committed: https://crrev.com/cf57e8b1ea2b1f75d1ac3d74c52a85f4951c590e
Cr-Commit-Position: refs/heads/master@{#291754}

[Finnur, 2014-08-25 16:43:25]

LGTM

[Devlin, 2014-08-25 19:30:32]

rdevlin.cronin@chromium.org changed reviewers:
+ pkasting@chromium.org

[Devlin, 2014-08-25 19:33:27]

On 2014/08/25 19:30:32, Devlin wrote:

(+pkasting@ for OWNERS)

[Peter Kasting, 2014-08-25 19:33:47]

LGTM

https://codereview.chromium.org/492503004/diff/20001/chrome/browser/ui/views/...
File chrome/browser/ui/views/toolbar/browser_actions_container_browsertest.cc
(right):

https://codereview.chromium.org/492503004/diff/20001/chrome/browser/ui/views/...
chrome/browser/ui/views/toolbar/browser_actions_container_browsertest.cc:231:
EXPECT_NE(container->GetPreferredSize(), gfx::Size());
Nit: (expected, actual)

Or you could do EXPECT_FALSE(container->GetPreferredSize().IsEmpty());

[Devlin, 2014-08-25 19:45:51]

https://codereview.chromium.org/492503004/diff/20001/chrome/browser/ui/views/...
File chrome/browser/ui/views/toolbar/browser_actions_container_browsertest.cc
(right):

https://codereview.chromium.org/492503004/diff/20001/chrome/browser/ui/views/...
chrome/browser/ui/views/toolbar/browser_actions_container_browsertest.cc:231:
EXPECT_NE(container->GetPreferredSize(), gfx::Size());
On 2014/08/25 19:33:47, Peter Kasting wrote:
> Nit: (expected, actual)
> 
> Or you could do EXPECT_FALSE(container->GetPreferredSize().IsEmpty());

Done.

[Devlin, 2014-08-25 19:45:55]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2014-08-25 19:46:53]

CQ is trying da patch. Follow status at

https://chromium-status.appspot.com/cq/rdevlin.cronin@chromium.org/492503004/...

[commit-bot: I haz the power, 2014-08-25 20:40:53]

Committed patchset #3 (40001) as 184ad2d518c55fa4a8a7ada942c63bc78cdb1917

[commit-bot: I haz the power, 2014-09-10 02:37:19]

Patchset 3 (id:??) landed as
https://crrev.com/cf57e8b1ea2b1f75d1ac3d74c52a85f4951c590e
Cr-Commit-Position: refs/heads/master@{#291754}