Making FocusManager portable to toolkit_views

Removed the last Windows specific part out of the focus manager. HWNDs are not subclassed anymore.The FocusManager is now created and owned by top-level WidgetWins.BUG=NoneTEST=Run the unit tests, UI tests, interactive UI tests. Fully  test the focus behavior in the browser: activate/deactivate the browser windows, make sure focus is remembered. Switch tabs, make sure focus is remembered for each tab. make sure accelerators work as expected. Test focus traversal in a web page, in the option dialog.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=18872

[Ben Goodger (Google), 2009-06-19 19:42:26]

LG, just a couple of notes...

http://codereview.chromium.org/125148/diff/2055/3173
File views/focus/focus_manager.h (right):

http://codereview.chromium.org/125148/diff/2055/3173#newcode36
Line 36: // |has_own_focus_manager| of the Init method lets you specify whether
that
you might update these comments.

http://codereview.chromium.org/125148/diff/2055/3157
File views/widget/widget_win.cc (right):

http://codereview.chromium.org/125148/diff/2055/3157#newcode431
Line 431: reinterpret_cast<WidgetWin*>(win_util::GetWindowUserData(root));
Why not use your GetWidget() function below, here?