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

chrome/browser/content_settings/mixed_content_settings_tab_helper.h

+// Copyright 2017 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_TAB_HELPER_H_
+#define CHROME_BROWSER_CONTENT_SETTINGS_MIXED_CONTENT_SETTINGS_TAB_HELPER_H_
+
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+namespace content {
+class SiteInstance;
+}
+
+// Controls mixed content related settings for the associated WebContent,

[nasko, 2017/02/10 01:08:20]

nit: WebContents

[carlosk, 2017/02/11 01:40:22]

Done.

+// working as the browser version of the mixed content state kept by
+// ContentSettingsObserver in the renderer.
+class MixedContentSettingsTabHelper
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<MixedContentSettingsTabHelper> {
+ public:
+  ~MixedContentSettingsTabHelper() override;
+
+  // Enables running active mixed content resources in the associated
+  // WebContents/tab.
+  void AllowRunningOfInsecureContent();
+
+  bool is_running_insecure_content_allowed() {
+    return is_running_insecure_content_allowed_;
+  }
+
+ private:
+  friend class content::WebContentsUserData<MixedContentSettingsTabHelper>;
+
+  explicit MixedContentSettingsTabHelper(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_ = nullptr;
+  bool is_running_insecure_content_allowed_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(MixedContentSettingsTabHelper);
+};
+
+#endif  // CHROME_BROWSER_CONTENT_SETTINGS_MIXED_CONTENT_SETTINGS_TAB_HELPER_H_