Move ExtensionCreator into extensions namespace

chrome/browser/extensions/extension_creator.cc

Index: chrome/browser/extensions/extension_creator.cc
diff --git a/chrome/browser/extensions/extension_creator.cc b/chrome/browser/extensions/extension_creator.cc
index 0fbfd05ec2fe06455cc00663940f8f91989918af..7c24389cf944bb60b8a27b1ace8de9f0cbaf5d21 100644
--- a/chrome/browser/extensions/extension_creator.cc
+++ b/chrome/browser/extensions/extension_creator.cc
@@ -23,12 +23,12 @@
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 
-using extensions::Extension;
-
 namespace {
   const int kRSAKeySize = 1024;
 };
 
+namespace extensions {
+
 ExtensionCreator::ExtensionCreator() : error_type_(kOtherError) {
 }
 
@@ -317,3 +317,5 @@ bool ExtensionCreator::Run(const FilePath& extension_dir,
   file_util::Delete(zip_path, false);
   return result;
 }
+
+}  // namespace extensions