Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/widevine_cdm_component_installer.cc

Index: chrome/browser/component_updater/widevine_cdm_component_installer.cc
diff --git a/chrome/browser/component_updater/widevine_cdm_component_installer.cc b/chrome/browser/component_updater/widevine_cdm_component_installer.cc
index 18abd46125523c08c6b15baa321f7a05b2343588..03375e081aa57529f8518177da6331232cb04904 100644
--- a/chrome/browser/component_updater/widevine_cdm_component_installer.cc
+++ b/chrome/browser/component_updater/widevine_cdm_component_installer.cc
@@ -38,6 +38,8 @@
 using content::BrowserThread;
 using content::PluginService;
 
+namespace component_updater {
+
 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
 
 namespace {
@@ -335,3 +337,6 @@ void RegisterWidevineCdmComponent(ComponentUpdateService* cus) {
   return;
 #endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
 }
+
+}  // namespace component_updater
+