Remove most ScopedVector usage from c/b/extensions.

chrome/browser/extensions/external_policy_loader_unittest.cc

Index: chrome/browser/extensions/external_policy_loader_unittest.cc
diff --git a/chrome/browser/extensions/external_policy_loader_unittest.cc b/chrome/browser/extensions/external_policy_loader_unittest.cc
index 9aaae0822babffe5d180861908fea0083cd32f2a..540ef9970451e1c781a8e814a8820bf240500611 100644
--- a/chrome/browser/extensions/external_policy_loader_unittest.cc
+++ b/chrome/browser/extensions/external_policy_loader_unittest.cc
@@ -103,8 +103,10 @@ class MockExternalPolicyProviderVisitor
 
   void OnExternalProviderUpdateComplete(
       const ExternalProviderInterface* provider,
-      const ScopedVector<ExternalInstallInfoUpdateUrl>& update_url_extensions,
-      const ScopedVector<ExternalInstallInfoFile>& file_extensions,
+      const std::vector<std::unique_ptr<ExternalInstallInfoUpdateUrl>>&
+          update_url_extensions,
+      const std::vector<std::unique_ptr<ExternalInstallInfoFile>>&
+          file_extensions,
       const std::set<std::string>& removed_extensions) override {
     ADD_FAILURE() << "Only win registry provider is expected to call this.";
   }