Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/component_unpacker.h

Index: chrome/browser/component_updater/component_unpacker.h
diff --git a/chrome/browser/component_updater/component_unpacker.h b/chrome/browser/component_updater/component_unpacker.h
index 903b495e115c42b0cd90021ee4f50751bc7ab788..c4dd8995710344b7d4d93884ff34ab5bb13a9e8e 100644
--- a/chrome/browser/component_updater/component_unpacker.h
+++ b/chrome/browser/component_updater/component_unpacker.h
@@ -7,11 +7,14 @@
 
 #include <string>
 #include <vector>
+
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/memory/scoped_ptr.h"
 
+namespace component_updater {
+
 class ComponentInstaller;
 class ComponentPatcher;
 
@@ -77,4 +80,6 @@ class ComponentUnpacker {
   int extended_error_;  // Provides additional error information.
 };
 
+}  // namespace component_updater
+
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_