ui: Cleanup class/struct forward declarations

chrome/browser/component_updater/recovery_component_installer.cc

Index: chrome/browser/component_updater/recovery_component_installer.cc
diff --git a/chrome/browser/component_updater/recovery_component_installer.cc b/chrome/browser/component_updater/recovery_component_installer.cc
index 063a0037211245a1b13e388c63861f4154928e91..aca11bba95459131121aa41600ac061c70374155 100644
--- a/chrome/browser/component_updater/recovery_component_installer.cc
+++ b/chrome/browser/component_updater/recovery_component_installer.cc
@@ -11,6 +11,7 @@
 
 #include "base/base_paths.h"
 #include "base/bind.h"
+#include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ -34,6 +35,7 @@
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/pref_service.h"
 #include "components/update_client/update_client.h"
+#include "components/update_client/utils.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
@@ -200,8 +202,9 @@ class RecoveryComponentInstaller : public update_client::CrxInstaller {
   // ComponentInstaller implementation:
   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;
@@ -211,6 +214,9 @@ class RecoveryComponentInstaller : public update_client::CrxInstaller {
  private:
   ~RecoveryComponentInstaller() override {}
 
+  bool DoInstall(const base::DictionaryValue& manifest,
+                 const base::FilePath& unpack_path);
+
   bool RunInstallCommand(const base::CommandLine& cmdline,
                          const base::FilePath& installer_folder) const;
 
@@ -347,8 +353,17 @@ bool SetPosixExecutablePermission(const base::FilePath& path) {
 }
 #endif  // defined(OS_POSIX)
 
-bool RecoveryComponentInstaller::Install(const base::DictionaryValue& manifest,
-                                         const base::FilePath& unpack_path) {
+update_client::CrxInstaller::Result RecoveryComponentInstaller::Install(
+    const base::DictionaryValue& manifest,
+    const base::FilePath& unpack_path) {
+  return update_client::InstallFunctionWrapper(
+      base::Bind(&RecoveryComponentInstaller::DoInstall, base::Unretained(this),
+                 base::ConstRef(manifest), base::ConstRef(unpack_path)));
+}
+
+bool RecoveryComponentInstaller::DoInstall(
+    const base::DictionaryValue& manifest,
+    const base::FilePath& unpack_path) {
   std::string name;
   manifest.GetStringASCII("name", &name);
   if (name != kRecoveryManifestName)