Try to cut down Browser/TabContents header dependencies.

chrome/browser/tab_contents/tab_contents.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 
 #include "build/build_config.h"
 
 #include <deque>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/scoped_ptr.h"
-#include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/dom_ui/dom_ui_factory.h"
 #include "chrome/browser/download/save_package.h"
 #include "chrome/browser/extensions/image_loading_tracker.h"
 #include "chrome/browser/fav_icon_helper.h"
 #include "chrome/browser/find_bar_controller.h"
 #include "chrome/browser/find_notification_details.h"
 #include "chrome/browser/jsmessage_box_client.h"
 #include "chrome/browser/password_manager/password_manager.h"
-#include "chrome/browser/printing/print_view_manager.h"
 #include "chrome/browser/shell_dialogs.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/tab_contents/constrained_window.h"
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "chrome/browser/tab_contents/language_state.h"
 #include "chrome/browser/tab_contents/navigation_controller.h"
 #include "chrome/browser/tab_contents/navigation_entry.h"
 #include "chrome/browser/tab_contents/page_navigator.h"
 #include "chrome/browser/tab_contents/render_view_host_manager.h"
 #include "chrome/browser/tab_contents/tab_specific_content_settings.h"
-#include "chrome/common/extensions/url_pattern.h"
-#include "chrome/common/navigation_types.h"
-#include "chrome/common/net/url_request_context_getter.h"
 #include "chrome/common/notification_registrar.h"
 #include "chrome/common/property_bag.h"
 #include "chrome/common/renderer_preferences.h"
 #include "chrome/common/translate_errors.h"
 #include "gfx/native_widget_types.h"
 #include "gfx/rect.h"
 #include "net/base/load_states.h"
 #include "webkit/glue/dom_operations.h"
 #include "webkit/glue/password_form.h"
-#include "webkit/glue/webpreferences.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace views {
 class WindowDelegate;
 }
 
 namespace base {
 class WaitableEvent;
 }
 
+namespace printing {
+class PrintViewManager;
+}
 
 namespace IPC {
 class Message;
 }
 
 class AutocompleteHistoryManager;
 class AutoFillManager;
 class BlockedPopupContainer;
 class DOMUI;
 class DownloadItem;
 class Extension;
 class GeolocationSettingsState;
 class LoadNotificationDetails;
 class OmniboxSearchHint;
 class PluginInstaller;
 class Profile;
 struct RendererPreferences;
 class RenderViewHost;
 class SiteInstance;
 class SkBitmap;
 class TabContents;
 class TabContentsDelegate;
 class TabContentsFactory;
 class TabContentsView;
+class URLPattern;
+class URLRequestContextGetter;
 struct ThumbnailScore;
 struct ViewHostMsg_DidPrintPage_Params;
 struct ViewHostMsg_FrameNavigate_Params;
 struct ViewHostMsg_RunFileChooser_Params;
+struct WebPreferences;
 
 // Describes what goes in the main content area of a tab. TabContents is
 // the only type of TabContents, and these should be merged together.
 class TabContents : public PageNavigator,
                     public NotificationObserver,
                     public RenderViewHostDelegate,
                     public RenderViewHostDelegate::BrowserIntegration,
                     public RenderViewHostDelegate::Resource,
                     public RenderViewHostManager::Delegate,
                     public SelectFileDialog::Listener,
@@ skipping 942 matching lines @@
   // Manages creation and swapping of render views.
   RenderViewHostManager render_manager_;
 
   // Stores random bits of data for others to associate with this object.
   PropertyBag property_bag_;
 
   // Registers and unregisters us for notifications.
   NotificationRegistrar registrar_;
 
   // Handles print preview and print job for this contents.
-  printing::PrintViewManager printing_;
+  scoped_ptr<printing::PrintViewManager> printing_;
 
   // SavePackage, lazily created.
   scoped_refptr<SavePackage> save_package_;
 
   // AutocompleteHistoryManager, lazily created.
   scoped_ptr<AutocompleteHistoryManager> autocomplete_history_manager_;
 
   // AutoFillManager, lazily created.
   scoped_ptr<AutoFillManager> autofill_manager_;
 
@@ skipping 196 matching lines @@
 
   // See description above setter.
   bool closed_by_user_gesture_;
 
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_