[on-hold][subresource_filter] Add ActivationTracker to track all activated contents

chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h

Index: chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h
diff --git a/chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h b/chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h
index 292259c0b2bad4d3dd4f8c8ce7625071b126ab54..eefb50ac2f6cb76ef7b49d33ec7bfd22c8497a27 100644
--- a/chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h
+++ b/chrome/browser/subresource_filter/subresource_filter_profile_context_factory.h
@@ -10,21 +10,25 @@
 
 class KeyedService;
 class Profile;
+class SubresourceFilterProfileContext;
 
 // This class is responsible for instantiating a profile-scoped context for
 // subresource filtering.
 class SubresourceFilterProfileContextFactory
     : public BrowserContextKeyedServiceFactory {
  public:
-  static void EnsureForProfile(Profile* profile);
+  static SubresourceFilterProfileContext* GetForProfile(Profile* profile);
 
   static SubresourceFilterProfileContextFactory* GetInstance();
 
   SubresourceFilterProfileContextFactory();
 
  private:
+  // BrowserContextKeyedServiceFactory:
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* profile) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
 
   DISALLOW_COPY_AND_ASSIGN(SubresourceFilterProfileContextFactory);
 };