Extract InstallVerifier from ExtensionSystem.

chrome/browser/extensions/test_extension_system.cc

Index: chrome/browser/extensions/test_extension_system.cc
diff --git a/chrome/browser/extensions/test_extension_system.cc b/chrome/browser/extensions/test_extension_system.cc
index f1d5b1c8cdf7d6a25d03389262ac43bc506206c9..31d04defa80936bacb0494cfdec3e4b867eba6a8 100644
--- a/chrome/browser/extensions/test_extension_system.cc
+++ b/chrome/browser/extensions/test_extension_system.cc
@@ -83,8 +83,6 @@ ExtensionService* TestExtensionSystem::CreateExtensionService(
     bool autoupdate_enabled) {
   if (!ExtensionPrefs::Get(profile_))
     CreateExtensionPrefs(command_line, install_directory);
-  install_verifier_.reset(
-      new InstallVerifier(ExtensionPrefs::Get(profile_), profile_));
   // The ownership of |value_store_| is immediately transferred to state_store_,
   // but we keep a naked pointer to the TestingValueStore.
   scoped_ptr<TestingValueStore> value_store(new TestingValueStore());
@@ -155,10 +153,6 @@ void TestExtensionSystem::SetEventRouter(scoped_ptr<EventRouter> event_router) {
 
 EventRouter* TestExtensionSystem::event_router() { return event_router_.get(); }
 
-InstallVerifier* TestExtensionSystem::install_verifier() {
-  return install_verifier_.get();
-}
-
 QuotaService* TestExtensionSystem::quota_service() {
   return quota_service_.get();
 }