Add way for PermissionContext to be automatically restricted to secure origins.

chrome/browser/media/protected_media_identifier_permission_context.h

 // Copyright 2013 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_MEDIA_PROTECTED_MEDIA_IDENTIFIER_PERMISSION_CONTEXT_H_
 #define CHROME_BROWSER_MEDIA_PROTECTED_MEDIA_IDENTIFIER_PERMISSION_CONTEXT_H_
 
 #include "chrome/browser/content_settings/permission_context_base.h"
 #include "components/content_settings/core/common/permission_request_id.h"
 
@@ skipping 39 matching lines @@
       const GURL& embedding_origin) const override;
   void CancelPermissionRequest(content::WebContents* web_contents,
                                const PermissionRequestID& id) override;
 
  private:
   ~ProtectedMediaIdentifierPermissionContext() override;
 
   void UpdateTabContext(const PermissionRequestID& id,
                         const GURL& requesting_frame,
                         bool allowed) override;
+  bool IsRestrictedToSecureOrigins() const override;
 
   // Returns whether "Protected content" is enabled based on factors other
   // than the protected media identifier content setting itself. For example,
   // it can be disabled by a master switch in content settings, in incognito or
   // guest mode, or by the device policy.
   bool IsProtectedMediaIdentifierEnabled() const;
 
 #if defined(OS_CHROMEOS)
   void OnPlatformVerificationConsentResponse(
       content::WebContents* web_contents,
@@ skipping 14 matching lines @@
 
   // Must be the last member, to ensure that it will be
   // destroyed first, which will invalidate weak pointers
   base::WeakPtrFactory<ProtectedMediaIdentifierPermissionContext> weak_factory_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ProtectedMediaIdentifierPermissionContext);
 };
 
 #endif  // CHROME_BROWSER_MEDIA_PROTECTED_MEDIA_IDENTIFIER_PERMISSION_CONTEXT_H_