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

components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle_unittest.cc

 // Copyright 2017 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.
 
 #include "components/subresource_filter/content/browser/subresource_filter_safe_browsing_activation_throttle.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
@@ skipping 49 matching lines @@
  public:
   MockSubresourceFilterClient() {}
 
   ~MockSubresourceFilterClient() override = default;
 
   MOCK_METHOD1(ToggleNotificationVisibility, void(bool));
   MOCK_METHOD1(ShouldSuppressActivation, bool(content::NavigationHandle*));
   MOCK_METHOD1(WhitelistByContentSettings, void(const GURL&));
   MOCK_METHOD1(WhitelistInCurrentWebContents, void(const GURL&));
   MOCK_METHOD0(GetRulesetDealer, VerifiedRulesetDealer::Handle*());
+  MOCK_METHOD1(OnPageActivated, void(const ActivationState&));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockSubresourceFilterClient);
 };
 
 // Throttle to call WillProcessResponse on the factory, which is otherwise
 // called by the ThrottleManager.
 class TestForwardingNavigationThrottle : public content::NavigationThrottle {
  public:
   TestForwardingNavigationThrottle(content::NavigationHandle* handle)
@@ skipping 181 matching lines @@
                             0);
   tester().ExpectTotalCount(kNavigationChainSizeSubresourceFilterSuffix, 0);
 }
 
 // TODO(melandory): Once non-defering check in WillStart is implemented add one
 // more test that destroys the Navigation along with corresponding throttles
 // while the SB check is pending? (To be run by ASAN bots to ensure
 // no use-after-free.)
 
 }  // namespace subresource_filter