First experimental implementation of the Clear-Site-Data header

content/browser/frame_host/navigation_handle_impl.cc

Index: content/browser/frame_host/navigation_handle_impl.cc
diff --git a/content/browser/frame_host/navigation_handle_impl.cc b/content/browser/frame_host/navigation_handle_impl.cc
index d7dcbefabbf2f06121040f756c61a2c45587d524..98b1cb54858b0322fe63814f20417e352e59a713 100644
--- a/content/browser/frame_host/navigation_handle_impl.cc
+++ b/content/browser/frame_host/navigation_handle_impl.cc
@@ -6,7 +6,9 @@
 
 #include <utility>
 
+#include "base/command_line.h"
 #include "base/logging.h"
+#include "content/browser/browsing_data/clear_site_data_throttle.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/navigator_delegate.h"
@@ -16,6 +18,7 @@
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/browser_side_navigation_policy.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_switches.h"
 #include "net/url_request/redirect_info.h"
 #include "url/gurl.h"
 #include "url/url_constants.h"
@@ -30,6 +33,11 @@ void UpdateThrottleCheckResult(
   *to_update = result;
 }
 
+bool AreExperimentalFeaturesEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableExperimentalWebPlatformFeatures);
+}
+
 }  // namespace
 
 // static
@@ -323,7 +331,14 @@ void NavigationHandleImpl::WillStartRequest(
   state_ = WILL_SEND_REQUEST;
   complete_callback_ = callback;
 
-  // Register the navigation throttles. The ScopedVector returned by
+  // Register the platform's navigation throttles.
+  if (AreExperimentalFeaturesEnabled()) {
+    std::unique_ptr<content::NavigationThrottle> clear_site_data_throttle =
+        content::ClearSiteDataThrottle::CreateThrottleFor(this);
+    throttles_.push_back(std::move(clear_site_data_throttle));
+  }
+
+  // Register the embedder's navigation throttles. The ScopedVector returned by
   // GetNavigationThrottles is not assigned to throttles_ directly because it
   // would overwrite any throttle previously added with
   // RegisterThrottleForTesting.