Extract InstallVerifier from ExtensionSystem.

chrome/browser/metrics/extensions_metrics_provider.cc

 // Copyright 2014 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 "chrome/browser/metrics/extensions_metrics_provider.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 173 matching lines @@
   if (!profile_manager)
     return;
 
   ExtensionState state = NO_EXTENSIONS;
 
   // The off-store metric includes information from all loaded profiles at the
   // time when this metric is generated.
   std::vector<Profile*> profiles = profile_manager->GetLoadedProfiles();
   for (size_t i = 0u; i < profiles.size() && state < OFF_STORE; ++i) {
     extensions::InstallVerifier* verifier =
-        extensions::ExtensionSystem::Get(profiles[i])->install_verifier();
+        extensions::InstallVerifier::Get(profiles[i]);
 
     scoped_ptr<extensions::ExtensionSet> extensions(
         GetInstalledExtensions(profiles[i]));
     if (!extensions)
       continue;
 
     // Combine the state from each profile, always favoring the higher state as
     // defined by the order of ExtensionState.
     state = std::max(state, CheckForOffStore(*extensions.get(), *verifier));
   }
@@ skipping 21 matching lines @@
        it != extensions->end();
        ++it) {
     buckets.insert(HashExtension((*it)->id(), client_key));
   }
 
   for (std::set<int>::const_iterator it = buckets.begin(); it != buckets.end();
        ++it) {
     system_profile->add_occupied_extension_bucket(*it);
   }
 }