linux: offset toolbar graphic so tabs merge in properly.

chrome/browser/gtk/browser_toolbar_gtk.cc

Index: chrome/browser/gtk/browser_toolbar_gtk.cc
diff --git a/chrome/browser/gtk/browser_toolbar_gtk.cc b/chrome/browser/gtk/browser_toolbar_gtk.cc
index 0eca5b5f2e732428fae7f310ec6465318c946938..37cbd5d13de639ba44a64848dc1e1e51743f2a4b 100644
--- a/chrome/browser/gtk/browser_toolbar_gtk.cc
+++ b/chrome/browser/gtk/browser_toolbar_gtk.cc
@@ -270,7 +270,8 @@ gboolean BrowserToolbarGtk::OnContentAreaExpose(GtkWidget* widget,
                                                 GdkEventExpose* e,
                                                 BrowserToolbarGtk* toolbar) {
   toolbar->background_ninebox_.get()->RenderTopCenterStrip(widget,
-      0, widget->allocation.width);
+      0, widget->allocation.width, -2);
+
   return FALSE;  // Allow subwidgets to paint.
 }