ui: Cleanup class/struct forward declarations

chrome/browser/net/crl_set_fetcher.h

Index: chrome/browser/net/crl_set_fetcher.h
diff --git a/chrome/browser/net/crl_set_fetcher.h b/chrome/browser/net/crl_set_fetcher.h
index 540647a75ee8eea7087649144aa8fa34790570f9..c045aafe6837103b9f279df9ca362d9b44d2bb8b 100644
--- a/chrome/browser/net/crl_set_fetcher.h
+++ b/chrome/browser/net/crl_set_fetcher.h
@@ -40,8 +40,9 @@ class CRLSetFetcher : public update_client::CrxInstaller {
 
   // ComponentInstaller interface
   void OnUpdateError(int error) override;
-  bool Install(const base::DictionaryValue& manifest,
-               const base::FilePath& unpack_path) override;
+  update_client::CrxInstaller::Result Install(
+      const base::DictionaryValue& manifest,
+      const base::FilePath& unpack_path) override;
   bool GetInstalledFile(const std::string& file,
                         base::FilePath* installed_file) override;
   bool Uninstall() override;
@@ -79,6 +80,9 @@ class CRLSetFetcher : public update_client::CrxInstaller {
   // the disk.
   void DoDeleteFromDisk();
 
+  bool DoInstall(const base::DictionaryValue& manifest,
+                 const base::FilePath& unpack_path);
+
   component_updater::ComponentUpdateService* cus_;
 
   // Path where the CRL file is stored.