[subresource_filter] Remove some state from the driver factory

components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h

Index: components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h
diff --git a/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h b/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h
index b7969d7705d01efbf024f6f77a7e6f18659a16fc..2402e8888ca3e4e645082f8bea2d3b1264d00f1c 100644
--- a/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h
+++ b/components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h
@@ -9,7 +9,7 @@
 #include <memory>
 #include <set>
 #include <string>
-#include <utility>
+#include <unordered_map>
 #include <vector>
 
 #include "base/macros.h"
@@ -17,6 +17,7 @@
 #include "base/time/time.h"
 #include "components/safe_browsing_db/util.h"
 #include "components/subresource_filter/content/browser/content_subresource_filter_throttle_manager.h"
+#include "components/subresource_filter/core/common/activation_decision.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
@@ -46,32 +47,6 @@ class ContentSubresourceFilterDriverFactory
       public content::WebContentsObserver,
       public ContentSubresourceFilterThrottleManager::Delegate {
  public:
-  // NOTE: ActivationDecision backs a UMA histogram, so it is append-only.
-  enum class ActivationDecision {
-    // The activation decision is unknown, or not known yet.
-    UNKNOWN,
-
-    // Subresource filtering was activated.
-    ACTIVATED,
-
-    // Did not activate because subresource filtering was disabled.
-    ACTIVATION_DISABLED,
-
-    // Did not activate because the main frame document URL had an unsupported
-    // scheme.
-    UNSUPPORTED_SCHEME,
-
-    // Did not activate because the main frame document URL was whitelisted.
-    URL_WHITELISTED,
-
-    // Did not activate because the main frame document URL did not match the
-    // activation list.
-    ACTIVATION_LIST_NOT_MATCHED,
-
-    // Max value for enum.
-    ACTIVATION_DECISION_MAX
-  };
-
   static void CreateForWebContents(
       content::WebContents* web_contents,
       std::unique_ptr<SubresourceFilterClient> client);
@@ -102,12 +77,6 @@ class ContentSubresourceFilterDriverFactory
   // Reloads the page and inserts the host of its URL to the whitelist.
   void OnReloadRequested();
 
-  // Returns the |ActivationDecision| for the current main frame
-  // document.
-  ActivationDecision GetActivationDecisionForLastCommittedPageLoad() const {
-    return activation_decision_;
-  }
-
   // ContentSubresourceFilterThrottleManager::Delegate:
   void OnFirstSubresourceLoadDisallowed() override;
   bool ShouldSuppressActivation(
@@ -115,7 +84,7 @@ class ContentSubresourceFilterDriverFactory
   void WillProcessResponse(
       content::NavigationHandle* navigation_handle) override;
 
-  ContentSubresourceFilterThrottleManager* throttle_manager() {
+  ContentSubresourceFilterThrottleManager* throttle_manager() const {
     return throttle_manager_.get();
   }
 
@@ -153,10 +122,6 @@ class ContentSubresourceFilterDriverFactory
 
   std::unique_ptr<ContentSubresourceFilterThrottleManager> throttle_manager_;
 
-  ActivationLevel activation_level_;
-  ActivationDecision activation_decision_;
-  bool measure_performance_;
-
   // The URLs in the navigation chain.
   std::vector<GURL> navigation_chain_;