Add early-injection capability to user scripts. I haven't yet

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 9db7e681e358883a66bb88231b6d41d58d842ae9..083ea7fd9e0deffa4a63f00ced12283b63c7c6b0 100644
--- a/chrome/renderer/user_script_slave.cc
+++ b/chrome/renderer/user_script_slave.cc
@@ -87,10 +87,12 @@ bool UserScriptSlave::UpdateScripts(base::SharedMemoryHandle shared_memory) {
   return true;
 }
 
-bool UserScriptSlave::InjectScripts(WebFrame* frame) {
+bool UserScriptSlave::InjectScripts(WebFrame* frame,
+                                    UserScript::RunLocation location) {
   for (std::vector<UserScript*>::iterator script = scripts_.begin();
        script != scripts_.end(); ++script) {
-    if ((*script)->MatchesUrl(frame->GetURL())) {
+    if ((*script)->MatchesUrl(frame->GetURL()) &&
+        (*script)->run_location() == location) {
       std::string inject(kUserScriptHead);
       inject.append(api_js_.as_string());
       inject.append(script_contents_[*script].as_string());