Move blocked content from TabContents to TabContentsWrapper.

chrome/browser/ui/blocked_content/blocked_content_tab_helper_delegate.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 CHROME_BROWSER_UI_BLOCKED_CONTENT_BLOCKED_CONTENT_TAB_HELPER_DELEGATE_H_
+#define CHROME_BROWSER_UI_BLOCKED_CONTENT_BLOCKED_CONTENT_TAB_HELPER_DELEGATE_H_
+#pragma once
+
+class TabContentsWrapper;
+
+// Objects implement this interface to get notified about changes in the
+// BlockedContentTabHelper and to provide necessary functionality.
+class BlockedContentTabHelperDelegate {
+ public:
+  // If |source| is constrained, returns the tab containing it.  Otherwise
+  // returns |source|.
+  virtual TabContentsWrapper* GetConstrainingContents(
+      TabContentsWrapper* source) = 0;
+
+ protected:
+  virtual ~BlockedContentTabHelperDelegate();
+};
+
+#endif  // CHROME_BROWSER_UI_BLOCKED_CONTENT_BLOCKED_CONTENT_TAB_HELPER_DELEGATE_H_