Fix Views Omnibox diagonal strike styling.

Fix Views Omnibox diagonal strike styling.

Clear the diagonal strike style (before potentially applying URL security styling).

This was a simple regression from my http://crrev.com/180067
OmniboxViewViews previously cleared the diagonal strike style in line 919 of:
https://chromiumcodereview.appspot.com/11535014/diff/57050/chrome/browser/ui/views/omnibox/omnibox_view_views.cc
ApplyURLStyle(textfield_, 0, text.length(), base_color, false);
My change still reset the overall textfield color, but not the diagonal strike style. 

BUG=177082
TEST=Get SSL error (https://cacert.org), new tab, switch back to SSL error tab; only scheme has a strike.
R=pkasting@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=184322

[msw, 2013-02-21 05:21:09]

Hey Peter, please take a look; thanks!

[Peter Kasting, 2013-02-22 19:42:04]

LGTM

[commit-bot: I haz the power, 2013-02-23 15:50:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/msw@chromium.org/12315027/1

[commit-bot: I haz the power, 2013-02-23 18:09:29]

Change committed as 184322