Move Extension into extensions namespace

chrome/browser/extensions/extension_function_test_utils.h

Index: chrome/browser/extensions/extension_function_test_utils.h
diff --git a/chrome/browser/extensions/extension_function_test_utils.h b/chrome/browser/extensions/extension_function_test_utils.h
index 27336a52e1f5f4ddc3ba736ceae3911d4b88b09c..3ae6db8a28013b225542013b4822f8c1ea6d6e40 100644
--- a/chrome/browser/extensions/extension_function_test_utils.h
+++ b/chrome/browser/extensions/extension_function_test_utils.h
@@ -13,7 +13,6 @@
 
 class AsyncExtensionFunction;
 class Browser;
-class Extension;
 class UIThreadExtensionFunction;
 
 namespace base {
@@ -22,6 +21,10 @@ class DictionaryValue;
 class ListValue;
 }
 
+namespace extensions {
+class Extension;
+}
+
 namespace extension_function_test_utils {
 
 // Parse JSON and return as the specified type, or NULL if the JSON is invalid
@@ -45,12 +48,12 @@ base::ListValue* ToList(base::Value* val);
 
 // Creates an extension instance that can be attached to an ExtensionFunction
 // before running it.
-scoped_refptr<Extension> CreateEmptyExtension();
+scoped_refptr<extensions::Extension> CreateEmptyExtension();
 
 // Creates an extension instance with a specified location that can be attached
 // to an ExtensionFunction before running.
-scoped_refptr<Extension> CreateEmptyExtensionWithLocation(
-    Extension::Location location);
+scoped_refptr<extensions::Extension> CreateEmptyExtensionWithLocation(
+    extensions::Extension::Location location);
 
 enum RunFunctionFlags {
   NONE = 0,