First experimental implementation of the Clear-Site-Data header

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 264bffa5289c14ca41f7bd867563bdfefd1c26a4..8d0df37bd8c4df56eb9da55c9290fd5055d78170 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -9,6 +9,8 @@
 
 #include <stddef.h>
 
+#include <memory>
+
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -25,6 +27,7 @@ struct FrameHostMsg_DidCommitProvisionalLoad_Params;
 
 namespace content {
 
+class ClearSiteDataHeaderObserver;
 class NavigatorDelegate;
 class ResourceRequestBodyImpl;
 
@@ -306,6 +309,9 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   // A list of Throttles registered for this navigation.
   ScopedVector<NavigationThrottle> throttles_;
 
+  // Handler of the experiment Clear-Site-Data header.
+  std::unique_ptr<ClearSiteDataHeaderObserver> clear_site_data_header_observer_;
+
   // The index of the next throttle to check.
   size_t next_index_;