Move UserScript and related into extensions namespace

chrome/renderer/extensions/user_script_scheduler.h

Index: chrome/renderer/extensions/user_script_scheduler.h
diff --git a/chrome/renderer/extensions/user_script_scheduler.h b/chrome/renderer/extensions/user_script_scheduler.h
index 125ec999f99f7b4ced1cb92b392e00393b35411a..20de23484a818aa6a315b50f393f6cc213c38aae 100644
--- a/chrome/renderer/extensions/user_script_scheduler.h
+++ b/chrome/renderer/extensions/user_script_scheduler.h
@@ -20,6 +20,8 @@ namespace WebKit {
 class WebFrame;
 }
 
+namespace extensions {
+
 // Implements support for injecting scripts at different times in the document
 // loading process. The different possible time are described in
 // UserScript::RunLocation.
@@ -42,7 +44,7 @@ class WebFrame;
 class UserScriptScheduler {
  public:
   UserScriptScheduler(WebKit::WebFrame* frame,
-                          ExtensionDispatcher* extension_dispatcher);
+                      ExtensionDispatcher* extension_dispatcher);
   ~UserScriptScheduler();
 
   void ExecuteCode(const ExtensionMsg_ExecuteCode_Params& params);
@@ -89,4 +91,6 @@ class UserScriptScheduler {
   ExtensionDispatcher* extension_dispatcher_;
 };
 
+}  // namespace extensions
+
 #endif  // CHROME_RENDERER_EXTENSIONS_USER_SCRIPT_SCHEDULER_H_