TEST ONLY: Duplicate FP rather than modifying in place

content/child/blink_platform_impl.h

 // Copyright 2014 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 CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 108 matching lines @@
   // This class does *not* own the compositor thread. It is the responsibility
   // of the caller to ensure that the compositor thread is cleared before it is
   // destructed.
   void SetCompositorThread(blink::scheduler::WebThreadBase* compositor_thread);
 
   blink::WebFeaturePolicy* createFeaturePolicy(
       const blink::WebFeaturePolicy* parentPolicy,
       const blink::WebParsedFeaturePolicyHeader& containerPolicy,
       const blink::WebParsedFeaturePolicyHeader& policyHeader,
       const blink::WebSecurityOrigin& origin) override;
-  void resetFeaturePolicyOrigin(blink::WebFeaturePolicy* parentPolicy,
-                                const blink::WebSecurityOrigin&) override;
+  blink::WebFeaturePolicy* duplicateFeaturePolicyWithOrigin(
+      const blink::WebFeaturePolicy& policy,
+      const blink::WebSecurityOrigin& new_origin) override;
 
  private:
   void InternalInit();
   void WaitUntilWebThreadTLSUpdate(blink::scheduler::WebThreadBase* thread);
   void UpdateWebThreadTLS(blink::WebThread* thread, base::WaitableEvent* event);
 
   bool IsMainThread() const;
 
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
   WebThemeEngineImpl native_theme_engine_;
   WebFallbackThemeEngineImpl fallback_theme_engine_;
   base::ThreadLocalStorage::Slot current_thread_slot_;
   webcrypto::WebCryptoImpl web_crypto_;
 
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_refptr<NotificationDispatcher> notification_dispatcher_;
 
   blink::scheduler::WebThreadBase* compositor_thread_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_