Implement declarativeContent API.

chrome/browser/extensions/tab_helper.cc

Index: chrome/browser/extensions/tab_helper.cc
diff --git a/chrome/browser/extensions/tab_helper.cc b/chrome/browser/extensions/tab_helper.cc
index ada461fd738b55e961126988380326c16c6665de..60288fe87037923cdcae3e0607b4c801ebed298f 100644
--- a/chrome/browser/extensions/tab_helper.cc
+++ b/chrome/browser/extensions/tab_helper.cc
@@ -5,11 +5,14 @@
 #include "chrome/browser/extensions/tab_helper.h"
 
 #include "chrome/browser/extensions/activity_log.h"
+#include "chrome/browser/extensions/api/declarative/rules_registry_service.h"
+#include "chrome/browser/extensions/api/declarative_content/content_rules_registry.h"
 #include "chrome/browser/extensions/app_notify_channel_ui.h"
 #include "chrome/browser/extensions/crx_installer.h"
 #include "chrome/browser/extensions/extension_action.h"
 #include "chrome/browser/extensions/extension_action_manager.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
 #include "chrome/browser/extensions/page_action_controller.h"
 #include "chrome/browser/extensions/script_badge_controller.h"
@@ -82,7 +85,11 @@ TabHelper::TabHelper(content::WebContents* web_contents)
               this)),
       pending_web_app_action_(NONE),
       script_executor_(new ScriptExecutor(web_contents,
-                                          &script_execution_observers_)) {
+                                          &script_execution_observers_)),
+      content_rules_registry_(
+          ExtensionSystem::Get(
+              Profile::FromBrowserContext(web_contents->GetBrowserContext()))->
+          rules_registry_service()->content_rules_registry()) {
   // The ActiveTabPermissionManager requires a session ID; ensure this
   // WebContents has one.
   SessionTabHelper::CreateForWebContents(web_contents);
@@ -184,6 +191,9 @@ void TabHelper::RenderViewCreated(RenderViewHost* render_view_host) {
 void TabHelper::DidNavigateMainFrame(
     const content::LoadCommittedDetails& details,
     const content::FrameNavigateParams& params) {
+  content_rules_registry_->DidNavigateMainFrame(
+      web_contents(), details, params);
+
   if (details.is_in_page)
     return;
 
@@ -225,6 +235,8 @@ bool TabHelper::OnMessageReceived(const IPC::Message& message) {
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
     IPC_MESSAGE_HANDLER(ExtensionHostMsg_ContentScriptsExecuting,
                         OnContentScriptsExecuting)
+    IPC_MESSAGE_HANDLER(ExtensionHostMsg_OnWatchedPageChange,
+                        OnWatchedPageChange)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -413,6 +425,11 @@ void TabHelper::OnContentScriptsExecuting(
                                       on_url));
 }
 
+void TabHelper::OnWatchedPageChange(
+    const std::vector<std::string>& css_selectors) {
+  content_rules_registry_->Apply(web_contents(), css_selectors);
+}
+
 const Extension* TabHelper::GetExtension(const std::string& extension_app_id) {
   if (extension_app_id.empty())
     return NULL;