Introduce the ThrottleManager

components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.cc

Index: components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.cc
diff --git a/components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.cc b/components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.cc
index 5b1204fbcb145991ebc8a455bdb04cf400de05b0..3585f988ec0c7d90d6c5e6bd5c9a9fd4ac275b26 100644
--- a/components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.cc
+++ b/components/subresource_filter/content/browser/activation_state_computing_navigation_throttle.cc
@@ -22,7 +22,8 @@ ActivationStateComputingNavigationThrottle::CreateForMainFrame(
     content::NavigationHandle* navigation_handle) {
   DCHECK(navigation_handle->IsInMainFrame());
   return base::WrapUnique(new ActivationStateComputingNavigationThrottle(
-      navigation_handle, base::Optional<ActivationState>(), nullptr));
+      navigation_handle, base::Optional<ActivationState>(), nullptr,
+      base::OnceClosure()));
 }
 
 // static
@@ -30,23 +31,28 @@ std::unique_ptr<ActivationStateComputingNavigationThrottle>
 ActivationStateComputingNavigationThrottle::CreateForSubframe(
     content::NavigationHandle* navigation_handle,
     VerifiedRuleset::Handle* ruleset_handle,
-    const ActivationState& parent_activation_state) {
+    const ActivationState& parent_activation_state,
+    base::OnceClosure first_disallowed_load_callback) {
   DCHECK(!navigation_handle->IsInMainFrame());
   DCHECK_NE(ActivationLevel::DISABLED,
             parent_activation_state.activation_level);
   DCHECK(ruleset_handle);
   return base::WrapUnique(new ActivationStateComputingNavigationThrottle(
-      navigation_handle, parent_activation_state, ruleset_handle));
+      navigation_handle, parent_activation_state, ruleset_handle,
+      std::move(first_disallowed_load_callback)));
 }
 
 ActivationStateComputingNavigationThrottle::
     ActivationStateComputingNavigationThrottle(
         content::NavigationHandle* navigation_handle,
         const base::Optional<ActivationState> parent_activation_state,
-        VerifiedRuleset::Handle* ruleset_handle)
+        VerifiedRuleset::Handle* ruleset_handle,
+        base::OnceClosure first_disallowed_load_callback)
     : content::NavigationThrottle(navigation_handle),
       parent_activation_state_(parent_activation_state),
       ruleset_handle_(ruleset_handle),
+      first_disallowed_load_callback_(
+          std::move(first_disallowed_load_callback)),
       weak_ptr_factory_(this) {}
 
 ActivationStateComputingNavigationThrottle::
@@ -55,7 +61,8 @@ ActivationStateComputingNavigationThrottle::
 void ActivationStateComputingNavigationThrottle::
     NotifyPageActivationWithRuleset(
         VerifiedRuleset::Handle* ruleset_handle,
-        const ActivationState& page_activation_state) {
+        const ActivationState& page_activation_state,
+        base::OnceClosure first_disallowed_load_callback) {
   DCHECK(navigation_handle()->IsInMainFrame());
   DCHECK(!parent_activation_state_);
   DCHECK(!activation_state_);
@@ -65,6 +72,7 @@ void ActivationStateComputingNavigationThrottle::
          !ruleset_handle);
   parent_activation_state_.emplace(page_activation_state);
   ruleset_handle_ = ruleset_handle;
+  first_disallowed_load_callback_ = std::move(first_disallowed_load_callback);
 }
 
 content::NavigationThrottle::ThrottleCheckResult
@@ -90,14 +98,12 @@ ActivationStateComputingNavigationThrottle::WillProcessResponse() {
     DCHECK(parent);
     params.parent_document_origin = parent->GetLastCommittedOrigin();
   }
-  // TODO(csharrison): Replace the empty OnceClosure with a UI-triggering
-  // callback.
   async_filter_ = base::MakeUnique<AsyncDocumentSubresourceFilter>(
       ruleset_handle_, std::move(params),
       base::Bind(&ActivationStateComputingNavigationThrottle::
                      SetActivationStateAndResume,
                  weak_ptr_factory_.GetWeakPtr()),
-      base::OnceClosure());
+      std::move(first_disallowed_load_callback_));
   return content::NavigationThrottle::ThrottleCheckResult::DEFER;
 }