GTK: correct coordinate calculation for floating bookmark bar background pain...

chrome/browser/gtk/bookmark_bar_gtk.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/gtk/bookmark_bar_gtk.h"
 
 #include <vector>
 
 #include "app/gfx/gtk_util.h"
 #include "app/gfx/canvas_paint.h"
@@ skipping 1160 matching lines @@
         event->area.x + event->area.width - tabstrip_origin.x(),
         event->area.y + event->area.height - tabstrip_origin.y());
     cairo_fill(cr);
 
     cairo_destroy(cr);
   } else {
     gfx::Size tab_contents_size;
     if (!bar->GetTabContentsSize(&tab_contents_size))
       return FALSE;
     gfx::CanvasPaint canvas(event, true);
+
+    gfx::Rect area = GTK_WIDGET_NO_WINDOW(widget) ?
+        gfx::Rect(widget->allocation) :
+        gfx::Rect(0, 0, widget->allocation.width, widget->allocation.height);
     NtpBackgroundUtil::PaintBackgroundDetachedMode(theme_provider, &canvas,
-        // We can't just use gfx::Rect(widget->allocation) because the x,y for
-        // the allocation is relative to the parent widget rather than the
-        // GdkWindow.
-        gfx::Rect(0, 0, widget->allocation.width, widget->allocation.height),
-        tab_contents_size.height());
+        area, tab_contents_size.height());
   }
 
   return FALSE;  // Propagate expose to children.
 }
 
 // static
 void BookmarkBarGtk::OnParentSizeAllocate(GtkWidget* widget,
                                           GtkAllocation* allocation,
                                           BookmarkBarGtk* bar) {
   // In floating mode, our layout depends on the size of the tab contents.
@@ skipping 126 matching lines @@
     string16 link_text;
     SyncStatusUIHelper::MessageType sync_status;
     sync_status = SyncStatusUIHelper::GetLabels(
         sync_service_, &status_text, &link_text);
     if (sync_status == SyncStatusUIHelper::SYNC_ERROR) {
       show_sync_error_button = true;
     }
   }
   return show_sync_error_button;
 }