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

extensions/renderer/content_watcher.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/content_watcher.h"
 
 #include "content/public/renderer/render_view.h"
 #include "content/public/renderer/render_view_visitor.h"
 #include "extensions/common/extension_messages.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebScriptBindings.h"
 #include "third_party/WebKit/public/web/WebView.h"
 
 namespace extensions {
 
 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(
     const std::vector<std::string>& new_css_selectors_utf8) {
   blink::WebVector<blink::WebString> new_css_selectors(
       new_css_selectors_utf8.size());
   bool changed = new_css_selectors.size() != css_selectors_.size();
   for (size_t i = 0; i < new_css_selectors.size(); ++i) {
     new_css_selectors[i] =
         blink::WebString::fromUTF8(new_css_selectors_utf8[i]);
@@ skipping 74 matching lines @@
   }
   std::vector<std::string> selector_strings;
   for (std::set<base::StringPiece>::const_iterator it =
            transitive_selectors.begin();
        it != transitive_selectors.end();
        ++it)
     selector_strings.push_back(it->as_string());
   content::RenderView* view =
       content::RenderView::FromWebView(top_frame->view());
   view->Send(new ExtensionHostMsg_OnWatchedPageChange(view->GetRoutingID(),
+                                                      event_name_,
                                                       selector_strings));
 }
 
 }  // namespace extensions