Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/pnacl/pnacl_component_installer.h

Index: chrome/browser/component_updater/pnacl/pnacl_component_installer.h
diff --git a/chrome/browser/component_updater/pnacl/pnacl_component_installer.h b/chrome/browser/component_updater/pnacl/pnacl_component_installer.h
index e13f265212f2a5683714cbc8d06eff69079b730c..822b0b5f96efa1074ae4cbd9a94c620379c4c9ab 100644
--- a/chrome/browser/component_updater/pnacl/pnacl_component_installer.h
+++ b/chrome/browser/component_updater/pnacl/pnacl_component_installer.h
@@ -31,6 +31,8 @@ namespace pnacl {
 bool NeedsOnDemandUpdate();
 }
 
+namespace component_updater {
+
 // Component installer responsible for Portable Native Client files.
 // Files can be installed to a shared location, or be installed to
 // a per-user location.
@@ -95,4 +97,6 @@ class PnaclComponentInstaller : public ComponentInstaller {
   DISALLOW_COPY_AND_ASSIGN(PnaclComponentInstaller);
 };
 
+}  // namespace component_updater
+
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_PNACL_PNACL_COMPONENT_INSTALLER_H_