Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/recovery_component_installer.h

Index: chrome/browser/component_updater/recovery_component_installer.h
diff --git a/chrome/browser/component_updater/recovery_component_installer.h b/chrome/browser/component_updater/recovery_component_installer.h
index 95cf6e85fea87e761cb5d2beea445eb8d1f3440b..81d46c969d8aa87c4b5c5cdf60ffc14dfdaac8a9 100644
--- a/chrome/browser/component_updater/recovery_component_installer.h
+++ b/chrome/browser/component_updater/recovery_component_installer.h
@@ -5,10 +5,13 @@
 #ifndef CHROME_BROWSER_COMPONENT_UPDATER_RECOVERY_COMPONENT_INSTALLER_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_RECOVERY_COMPONENT_INSTALLER_H_
 
-class ComponentUpdateService;
 class PrefRegistrySimple;
 class PrefService;
 
+namespace component_updater {
+
+class ComponentUpdateService;
+
 // Component update registration for the recovery component. The job of the
 // recovery component is to repair the chrome installation or repair the Google
 // update installation. This is a last resort safety mechanism.
@@ -19,5 +22,7 @@ void RegisterRecoveryComponent(ComponentUpdateService* cus,
 // Register user preferences related to the recovery component.
 void RegisterPrefsForRecoveryComponent(PrefRegistrySimple* registry);
 
+}  // namespace component_updater
+
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_RECOVERY_COMPONENT_INSTALLER_H_