[CrOS] Fix reserved accelerators' behavior.
[CrOS] Fix reserved accelerators' behavior.

This CL fixes BrowserView::PreHandleKeyboardEvent() to make sure
reserved accelerators have the same behavior of normal ones handled by
views::FocusManager::OnKeyEvent() method.

BUG=54213
TEST=See bug report.

Review URL: http://codereview.chromium.org/3353008

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@58455 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser