linux: offset toolbar graphic so tabs merge in properly.

chrome/browser/gtk/browser_toolbar_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/browser_toolbar_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include "base/logging.h"
 #include "base/base_paths_linux.h"
@@ skipping 252 matching lines @@
   gtk_box_pack_start(GTK_BOX(toolbar_), button->widget(), FALSE, FALSE, 0);
 
   return button;
 }
 
 // static
 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.
 }
 
 // static
 void BrowserToolbarGtk::OnButtonClick(GtkWidget* button,
                                       BrowserToolbarGtk* toolbar) {
   int tag = -1;
   if (button == toolbar->back_->widget())
     tag = IDC_BACK;
   else if (button == toolbar->forward_->widget())
@@ skipping 120 matching lines @@
     rb.LoadPixbuf(IDR_CONTENT_TOP_RIGHT_CORNER),
     rb.LoadPixbuf(IDR_CONTENT_LEFT_SIDE),
     NULL,
     rb.LoadPixbuf(IDR_CONTENT_RIGHT_SIDE),
     rb.LoadPixbuf(IDR_CONTENT_BOTTOM_LEFT_CORNER),
     rb.LoadPixbuf(IDR_CONTENT_BOTTOM_CENTER),
     rb.LoadPixbuf(IDR_CONTENT_BOTTOM_RIGHT_CORNER)
   };
   background_ninebox_.reset(new NineBox(images));
 }