Prepare declarativeContent API for new script injection feature. Added Javascript types and functio…

extensions/renderer/content_watcher.cc

Index: extensions/renderer/content_watcher.cc
diff --git a/extensions/renderer/content_watcher.cc b/extensions/renderer/content_watcher.cc
index 684de5f4b51a4e3ac0aaae463bf8a0feab8f67bf..96e4b56f69b7e7712a20f1c9e594d59e1b2ca82a 100644
--- a/extensions/renderer/content_watcher.cc
+++ b/extensions/renderer/content_watcher.cc
@@ -19,7 +19,8 @@ using blink::WebString;
 using blink::WebVector;
 using blink::WebView;
 
-ContentWatcher::ContentWatcher() {}
+ContentWatcher::ContentWatcher(const std::string& event_name) :
+    event_name_(event_name) {}
 ContentWatcher::~ContentWatcher() {}
 
 void ContentWatcher::OnWatchPages(
@@ -114,6 +115,7 @@ void ContentWatcher::NotifyBrowserOfChange(
   content::RenderView* view =
       content::RenderView::FromWebView(top_frame->view());
   view->Send(new ExtensionHostMsg_OnWatchedPageChange(view->GetRoutingID(),
+                                                      event_name_,
                                                       selector_strings));
 }