PlzNavigate: Move navigation-level mixed content checks to the browser.

chrome/browser/content_settings/mixed_content_settings.h

+// Copyright (c) 2016 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_MIXED_CONTENT_SETTINGS_H_
+#define CHROME_BROWSER_CONTENT_SETTINGS_MIXED_CONTENT_SETTINGS_H_
+
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+namespace content {
+class SiteInstance;
+class NavigationHandle;

[jam, 2017/01/09 21:15:46]

nit: no need to forward declare a parameter to an overridden method

[carlosk, 2017/01/10 19:13:11]

Done.

+}
+
+// Controls mixed content related settings for the associated WebContents.
+class MixedContentSettings
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<MixedContentSettings> {
+ public:
+  ~MixedContentSettings() override;
+
+  // Enables running mixed-content resources in the tab containing the specified
+  // frame. This state is reset to the default of not allowed when the main
+  // frame navigates to a different SiteInstance.
+  void AllowRunningOfInsecureContent();
+
+  bool insecure_content_allowed_running() {
+    return insecure_content_allowed_running_;
+  }
+
+ private:
+  friend class content::WebContentsUserData<MixedContentSettings>;
+
+  explicit MixedContentSettings(content::WebContents* tab);
+
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
+
+  // Members to control mixed-content settings for the tab. They will be reset
+  // on cross-site main frame navigations.
+  content::SiteInstance* insecure_content_site_instance_;
+  bool insecure_content_allowed_running_;
+
+  DISALLOW_COPY_AND_ASSIGN(MixedContentSettings);
+};
+
+#endif  // CHROME_BROWSER_CONTENT_SETTINGS_MIXED_CONTENT_SETTINGS_H_