Browser plugin: Implement titleChanged event.

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index 86c3144be0facce626bb6bdd73a4a607d189416c..14fb57fb645725982d57f1b6616fa3dc068fdc8d 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -16,6 +16,7 @@
 #include "content/common/browser_plugin_messages.h"
 #include "content/common/view_messages.h"
 #include "content/port/browser/render_view_host_delegate_view.h"
+#include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_process_host.h"
@@ -63,6 +64,9 @@ BrowserPluginGuest::BrowserPluginGuest(int instance_id,
   notification_registrar_.Add(
       this, content::NOTIFICATION_RESOURCE_RECEIVED_REDIRECT,
       content::Source<content::WebContents>(web_contents));
+  notification_registrar_.Add(
+      this, content::NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
+      content::Source<content::WebContents>(web_contents));
 }
 
 BrowserPluginGuest::~BrowserPluginGuest() {
@@ -102,6 +106,16 @@ void BrowserPluginGuest::Observe(int type,
                    is_top_level);
       break;
     }
+    case NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED: {
+      DCHECK_EQ(Source<WebContents>(source).ptr(), web_contents());
+      std::pair<NavigationEntry*, bool>* title =
+          Details<std::pair<NavigationEntry*, bool> >(details).ptr();
+      if (title->first) {
+        string16 title_text = title->first->GetTitle();
+        TitleChange(title_text);
+      }
+      break;
+    }
     default:
       NOTREACHED() << "Unexpected notification sent.";
       break;
@@ -437,6 +451,11 @@ void BrowserPluginGuest::LoadRedirect(
           instance_id(), old_url, new_url, is_top_level));
 }
 
+void BrowserPluginGuest::TitleChange(const string16& title) {
+  SendMessageToEmbedder(
+      new BrowserPluginMsg_TitleChange(instance_id(), title));
+}
+
 void BrowserPluginGuest::DidCommitProvisionalLoadForFrame(
     int64 frame_id,
     bool is_main_frame,
@@ -455,6 +474,11 @@ void BrowserPluginGuest::DidCommitProvisionalLoadForFrame(
   SendMessageToEmbedder(
       new BrowserPluginMsg_LoadCommit(instance_id(), params));
   RecordAction(UserMetricsAction("BrowserPlugin.Guest.DidNavigate"));
+
+  // Also update title on commit, since the notifications only occur for
+  // changes to existing titles, not updates due to back/forward or to
+  // new pages with no titles.
+  TitleChange(web_contents()->GetTitle());
 }
 
 void BrowserPluginGuest::DidStopLoading(RenderViewHost* render_view_host) {