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..5c903263fdff53e3f0fa5e804de81090a1fa2f53 100644
--- a/extensions/renderer/content_watcher.cc
+++ b/extensions/renderer/content_watcher.cc
@@ -19,7 +19,10 @@ using blink::WebString;
 using blink::WebVector;
 using blink::WebView;
 
-ContentWatcher::ContentWatcher() {}
+ContentWatcher::ContentWatcher(const std::string& event_name,
+                               WatchedPagesRecipient watched_pages_recipient) :
+    event_name_(event_name),
+    watched_pages_recipient_(watched_pages_recipient) {}
 ContentWatcher::~ContentWatcher() {}
 
 void ContentWatcher::OnWatchPages(
@@ -113,8 +116,19 @@ void ContentWatcher::NotifyBrowserOfChange(
     selector_strings.push_back(it->as_string());
   content::RenderView* view =
       content::RenderView::FromWebView(top_frame->view());
-  view->Send(new ExtensionHostMsg_OnWatchedPageChange(view->GetRoutingID(),
-                                                      selector_strings));
+  switch (watched_pages_recipient_) {
+    case CONTENT_RULES_REGISTRY: {
+      view->Send(new ExtensionHostMsg_OnWatchedPageChange(view->GetRoutingID(),
+                                                          event_name_,
+                                                          selector_strings));
+      break;
+    }
+    case USER_SCRIPT_MANAGER: {
+      // TODO(markdittmer): Notify renderer-side script manager of
+      // selector_strings.
+      break;
+    }
+  }
 }
 
 }  // namespace extensions