Minor, unrelated changes from the browser side mixed-content patch.

chrome/browser/content_settings/tab_specific_content_settings.h

 // Copyright (c) 2012 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_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 10 matching lines @@
 #include "components/content_settings/core/browser/content_settings_observer.h"
 #include "components/content_settings/core/browser/content_settings_usages_state.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "net/cookies/canonical_cookie.h"
 
 class HostContentSettingsMap;
 
+namespace content {
+class NavigationHandle;
+}
+
 namespace net {
 class CookieOptions;
 }
 
 // TODO(msramek): Subresource filter and media currently are storing their state
 // in TabSpecificContentSettings: |microphone_camera_state_| and
 // |subresource_filter_enabled_| without being tied either to a single content
 // setting or to any content setting. This state is not ideal, potential
 // solution is to save this information via content::WebContentsUserData
 
@@ skipping 445 matching lines @@
   // Holds the previous committed url during a navigation.
   GURL previous_url_;
 
   // Observer to watch for content settings changed.
   ScopedObserver<HostContentSettingsMap, content_settings::Observer> observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TabSpecificContentSettings);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_