Add a WebKit API that registers a V8 extension to be loaded into content

chrome/renderer/user_script_slave.cc

Index: chrome/renderer/user_script_slave.cc
diff --git a/chrome/renderer/user_script_slave.cc b/chrome/renderer/user_script_slave.cc
index 48017c19a603eb2ad1d5cc997a14cb318325e277..f6a8f136ef8919efa2c15eb2b3ba28056c716067 100644
--- a/chrome/renderer/user_script_slave.cc
+++ b/chrome/renderer/user_script_slave.cc
@@ -11,6 +11,7 @@
 #include "base/pickle.h"
 #include "base/shared_memory.h"
 #include "base/string_util.h"
+#include "chrome/renderer/extension_groups.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/api/public/WebScriptSource.h"
 #include "webkit/glue/webframe.h"
@@ -160,7 +161,8 @@ bool UserScriptSlave::InjectScripts(WebFrame* frame,
                 StringPrintf(kInitExtension, script->extension_id().c_str()))));
       }
 
-      frame->ExecuteScriptInNewWorld(&sources.front(), sources.size());
+      frame->ExecuteScriptInNewWorld(&sources.front(), sources.size(),
+                                     EXTENSION_GROUP_CONTENT_SCRIPTS);
     }
   }