Add support for multiple simultaneous subresource_filter::Configurations.

components/subresource_filter/content/browser/content_subresource_filter_driver_factory.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_CONTENT_SUBRESOURCE_FILTER_DRIVER_FACTORY_H_
 #define COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_CONTENT_SUBRESOURCE_FILTER_DRIVER_FACTORY_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #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/browser/subresource_filter_features.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_user_data.h"
 #include "ui/base/page_transition_types.h"
 #include "url/gurl.h"
 
 namespace content {
 class WebContents;
 }  // namespace content
 
 namespace safe_browsing {
@@ skipping 19 matching lines @@
       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.
+    // Did not activate because subresource filtering was disabled by the
+    // highest priority configuration whose activation conditions were met.
     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.
+    // Did not activate because although there was a configuration whose
+    // activation conditions were met, the main frame URL was whitelisted.
     URL_WHITELISTED,
 
     // Did not activate because the main frame document URL did not match the
-    // activation list.
-    ACTIVATION_LIST_NOT_MATCHED,
+    // activation conditions of any of enabled configurations.
+    ACTIVATION_CONDITIONS_NOT_MET,
 
     // Max value for enum.
     ACTIVATION_DECISION_MAX
   };
 
   static void CreateForWebContents(content::WebContents* web_contents,
                                    SubresourceFilterClient* client);
 
   // Whether the |url|, |referrer|, and |transition| are considered to be
   // associated with a page reload.
@@ skipping 35 matching lines @@
   ContentSubresourceFilterThrottleManager* throttle_manager() {
     return throttle_manager_.get();
   }
 
   SubresourceFilterClient* client() { return client_; }
 
  private:
   friend class ContentSubresourceFilterDriverFactoryTest;
   friend class safe_browsing::SafeBrowsingServiceTest;
 
-  void ResetActivationState();
-
   // content::WebContentsObserver:
   void DidStartNavigation(
       content::NavigationHandle* navigation_handle) override;
   void DidRedirectNavigation(
       content::NavigationHandle* navigation_handle) override;
+  void DidFinishNavigation(
+      content::NavigationHandle* navigation_handle) override;
 
   // Checks base on the value of |url| and current activation scope if
   // activation signal should be sent.
-  ActivationDecision ComputeActivationDecisionForMainFrameNavigation(
-      content::NavigationHandle* navigation_handle) const;
+  void ComputeActivationForMainFrameNavigation(
+      content::NavigationHandle* navigation_handle);
+
+  // Returns whether a main-frame navigation to the given |url| satisfies the
+  // activation |conditions| of a given configuration, except for |priority|.
+  bool DoesMainFrameURLSatisfyActivationConditions(
+      const GURL& url,
+      const Configuration::ActivationConditions& conditions) const;
 
   bool DidURLMatchActivationList(const GURL& url,
                                  ActivationList activation_list) const;
 
   void AddActivationListMatch(const GURL& url, ActivationList match_type);
   int CalculateHitPatternForActivationList(
       ActivationList activation_list) const;
   void RecordRedirectChainMatchPattern() const;
 
   void RecordRedirectChainMatchPatternForList(
       ActivationList activation_list) const;
 
   // Must outlive this class.
   SubresourceFilterClient* client_;
 
   std::unique_ptr<ContentSubresourceFilterThrottleManager> throttle_manager_;
 
-  ActivationLevel activation_level_;
-  ActivationDecision activation_decision_;
-  bool measure_performance_;
+  // The activation decision corresponding to the most recently _started_
+  // non-same-document navigation in the main frame.
+  //
+  // The value is reset to ActivationDecision::UNKNOWN at the start of each such
+  // navigation, and will not be assigned until the navigation successfully
+  // reaches the WillProcessResponse stage (or successfully finishes if
+  // throttles are not invoked). This means that after a cancelled or otherwise
+  // unsuccessful navigation, the value will be left at UNKNOWN indefinitely.
+  ActivationDecision activation_decision_ =
+      ActivationDecision::ACTIVATION_DISABLED;
+
+  // The activation options corresponding to the most recently _committed_
+  // non-same-document navigation in the main frame.
+  //
+  // The value corresponding to the previous such navigation will be retained,
+  // and the new value not assigned until a subsequent navigation successfully
+  // reaches the WillProcessResponse stage (or successfully finishes if
+  // throttles are not invoked).
+  Configuration::ActivationOptions activation_options_;
 
   // The URLs in the navigation chain.
   std::vector<GURL> navigation_chain_;
 
   URLToActivationListsMap activation_list_matches_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSubresourceFilterDriverFactory);
 };
 
 }  // namespace subresource_filter
 
 #endif  // COMPONENTS_SUBRESOURCE_FILTER_CONTENT_BROWSER_CONTENT_SUBRESOURCE_FILTER_DRIVER_FACTORY_H_