Move small c/b/extensions classes into extensions namespace no.2

chrome/browser/extensions/pack_extension_job.h

Index: chrome/browser/extensions/pack_extension_job.h
diff --git a/chrome/browser/extensions/pack_extension_job.h b/chrome/browser/extensions/pack_extension_job.h
index 78027de2f0888eebb913cfb41e5558b0ae163ec6..4039d197dc3276f29e1d0b3f0fdaffa477270f70 100644
--- a/chrome/browser/extensions/pack_extension_job.h
+++ b/chrome/browser/extensions/pack_extension_job.h
@@ -13,6 +13,7 @@
 #include "content/public/browser/browser_thread.h"
 #include "chrome/browser/extensions/extension_creator.h"
 
+namespace extensions {
 
 // Manages packing an extension on the file thread and reporting the result
 // back to the UI.
@@ -23,9 +24,8 @@ class PackExtensionJob : public base::RefCountedThreadSafe<PackExtensionJob> {
    public:
     virtual void OnPackSuccess(const FilePath& crx_file,
                                const FilePath& key_file) = 0;
-    virtual void OnPackFailure(
-        const std::string& message,
-        extensions::ExtensionCreator::ErrorType error_type) = 0;
+    virtual void OnPackFailure(const std::string& message,
+                               ExtensionCreator::ErrorType error_type) = 0;
 
    protected:
     virtual ~Client() {}
@@ -57,9 +57,8 @@ class PackExtensionJob : public base::RefCountedThreadSafe<PackExtensionJob> {
   // If |asynchronous_| is false, this is run on whichever thread calls it.
   void Run();
   void ReportSuccessOnClientThread();
-  void ReportFailureOnClientThread(
-      const std::string& error,
-      extensions::ExtensionCreator::ErrorType error_type);
+  void ReportFailureOnClientThread(const std::string& error,
+                                   ExtensionCreator::ErrorType error_type);
 
   content::BrowserThread::ID client_thread_id_;
   Client* client_;
@@ -73,4 +72,6 @@ class PackExtensionJob : public base::RefCountedThreadSafe<PackExtensionJob> {
   DISALLOW_COPY_AND_ASSIGN(PackExtensionJob);
 };
 
+}  // namespace extensions
+
 #endif  // CHROME_BROWSER_EXTENSIONS_PACK_EXTENSION_JOB_H_