Move download stuff from download helper back to TabContents. This is basically a revert of r8576...

content/browser/tab_contents/tab_contents.h

 // 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.
 
 #ifndef CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 19 matching lines @@
 #include "ui/gfx/native_widget_types.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_handle.h"
 #endif
 
 namespace gfx {
 class Rect;
 }
 
+class DownloadItem;
 class Extension;
 class LoadNotificationDetails;
 class Profile;
 struct RendererPreferences;
 class RenderViewHost;
 class SessionStorageNamespace;
 class SiteInstance;
 class SkBitmap;
 class TabContentsDelegate;
 class TabContentsObserver;
@@ skipping 285 matching lines @@
   virtual bool FocusLocationBarByDefault();
 
   // Focuses the location bar.
   virtual void SetFocusToLocationBar(bool select_all);
 
   // Creates a view and sets the size for the specified RVH.
   virtual void CreateViewAndSetSizeForRVH(RenderViewHost* rvh);
 
   // Toolbars and such ---------------------------------------------------------
 
+  // Notifies the delegate that a download is about to be started.
+  // This notification is fired before a local temporary file has been created.
+  bool CanDownload(int request_id);
+
+  // Notifies the delegate that a download started.
+  void OnStartDownload(DownloadItem* download);
+
   // Called when a ConstrainedWindow we own is about to be closed.
   void WillClose(ConstrainedWindow* window);
 
   // Interstitials -------------------------------------------------------------
 
   // Various other systems need to know about our interstitials.
   bool showing_interstitial_page() const {
     return render_manager_.interstitial_page() != NULL;
   }
 
@@ skipping 460 matching lines @@
   ObserverList<TabContentsObserver> observers_;
 
   // Content restrictions, used to disable print/copy etc based on content's
   // (full-page plugins for now only) permissions.
   int content_restrictions_;
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_