Implement GENERICBLOCK option.

components/subresource_filter/content/renderer/document_subresource_filter.cc

Index: components/subresource_filter/content/renderer/document_subresource_filter.cc
diff --git a/components/subresource_filter/content/renderer/document_subresource_filter.cc b/components/subresource_filter/content/renderer/document_subresource_filter.cc
index ad1f90c87bfee55f7aa28505bec3a89cb01417d9..944b3130d433c915fc21f2b0485abd9b6bee268d 100644
--- a/components/subresource_filter/content/renderer/document_subresource_filter.cc
+++ b/components/subresource_filter/content/renderer/document_subresource_filter.cc
@@ -96,15 +96,19 @@ DocumentSubresourceFilter::DocumentSubresourceFilter(
       filtering_disabled_for_document_ = true;
       return;
     }
+    // TODO(pkalinnikov): Match several activation types in a batch.
+    generic_blocking_rules_disabled_ =
+        generic_blocking_rules_disabled_ ||
+        ruleset_matcher_.ShouldDisableFilteringForDocument(
+            document_url, parent_document_origin,
+            proto::ACTIVATION_TYPE_GENERICBLOCK);
+
     // TODO(pkalinnikov): Think about avoiding this conversion.
     parent_document_origin = url::Origin(document_url);
   }
 
   url::Origin document_origin = std::move(parent_document_origin);
   document_origin_.reset(new FirstPartyOrigin(std::move(document_origin)));
-
-  // TODO(pkalinnikov): Implement GENERICBLOCK activation type as well.
-  // TODO(pkalinnikov): Match several activation types in a batch.
 }
 
 DocumentSubresourceFilter::~DocumentSubresourceFilter() = default;
@@ -126,8 +130,8 @@ bool DocumentSubresourceFilter::allowLoad(
   ++num_loads_evaluated_;
   DCHECK(document_origin_);
   if (ruleset_matcher_.ShouldDisallowResourceLoad(
-          GURL(resourceUrl), *document_origin_,
-          ToElementType(request_context))) {
+          GURL(resourceUrl), *document_origin_, ToElementType(request_context),
+          generic_blocking_rules_disabled_)) {
     ++num_loads_matching_rules_;
     if (activation_state_ == ActivationState::ENABLED) {
       if (!first_disallowed_load_callback_.is_null()) {