Initialize message pump not to use gtk. WindowSizer for aura

Initialize message pump not to use gtk. 
  This is a temp fix to remove gtk_init. We should remove this once we remove gtk from message pump, which should be done as a part of AURA->TOOLKIT_USES_GTK=0

WindowSizer/gfx::screen for aura

BUG=none
TEST=none

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=101922

[Emmanuel Saint-loubert-Bié, 2011-09-19 18:31:28]

That change intriduces a new crash here:

  bool GetScreenWorkArea(gfx::Rect* out_rect) const {
    gboolean ok;
    guchar* raw_data = NULL;
    gint data_len = 0;
    ok = gdk_property_get(gdk_get_default_root_window(),  // a gdk window
                          gdk_atom_intern("_NET_WORKAREA", FALSE),  // property
                          gdk_atom_intern("CARDINAL", FALSE),  // property type
                          0,  // byte offset into property
                          0xff,  // property length to retrieve
                          false,  // delete property after retrieval?
                          NULL,  // returned property type
                          NULL,  // returned data format
                          &data_len,  // returned data len
                          &raw_data);  // returned data

[oshima, 2011-09-19 21:56:02]

Fixed DCHECK. aura-lized window-sizer and gfx::screen (aura window-sizer was
necessary to remove gtk_init). PTAL.

[Emmanuel Saint-loubert-Bié, 2011-09-19 22:34:06]

LGTM

[Ben Goodger (Google), 2011-09-19 23:20:48]

lgtm