Get rid of extensions dependency from content\browser.

chrome/browser/ui/gtk/tabs/dragged_tab_gtk.cc

 // Copyright (c) 2011 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/ui/gtk/tabs/dragged_tab_gtk.h"
 
 #include <gdk/gdk.h>
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
+#include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "chrome/browser/ui/gtk/tabs/tab_renderer_gtk.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "content/browser/renderer_host/backing_store_x.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "ui/base/x/x11_util.h"
 #include "ui/gfx/gtk_util.h"
 
 namespace {
 
 // The size of the dragged window frame.
@@ skipping 21 matching lines @@
                              const gfx::Size& contents_size,
                              bool mini)
     : data_source_(datasource),
       renderer_(new TabRendererGtk(ThemeServiceFactory::GetForProfile(
           datasource->profile()))),
       attached_(false),
       mouse_tab_offset_(mouse_tab_offset),
       attached_tab_size_(TabRendererGtk::GetMinimumSelectedSize()),
       contents_size_(contents_size),
       close_animation_(this) {
+  TabContentsWrapper* wrapper =
+      TabContentsWrapper::GetCurrentWrapperForContents(datasource);
   renderer_->UpdateData(datasource,
-                        datasource->is_app(),
+                        wrapper->extension_tab_helper()->is_app(),
                         false); // loading_only
   renderer_->set_mini(mini);
 
   container_ = gtk_window_new(GTK_WINDOW_POPUP);
   SetContainerColorMap();
   gtk_widget_set_app_paintable(container_, TRUE);
   g_signal_connect(container_, "expose-event",
                    G_CALLBACK(OnExposeEvent), this);
   gtk_widget_add_events(container_, GDK_STRUCTURE_MASK);
 
@@ skipping 261 matching lines @@
   cairo_set_source_surface(cr, surface, 0, 0);
   cairo_paint(cr);
 
   cairo_destroy(cr);
 
   cairo_surface_destroy(surface);
 
   // We've already drawn the tab, so don't propagate the expose-event signal.
   return TRUE;
 }