Add zoom extension API

chrome/browser/host_zoom_map.cc

Index: chrome/browser/host_zoom_map.cc
diff --git a/chrome/browser/host_zoom_map.cc b/chrome/browser/host_zoom_map.cc
index 3dc257b677530b112700293ccdc0a60c1e68c1bc..0aefe2b28a5e4c5b701c9e754eecf861958e1c39 100644
--- a/chrome/browser/host_zoom_map.cc
+++ b/chrome/browser/host_zoom_map.cc
@@ -100,7 +100,7 @@ double HostZoomMap::GetZoomLevel(const GURL& url) const {
   return (i == host_zoom_levels_.end()) ? default_zoom_level_ : i->second;
 }
 
-void HostZoomMap::SetZoomLevel(const GURL& url, double level) {
+void HostZoomMap::SetZoomLevel(const GURL& url, int request_id, double level) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!profile_)
     return;
@@ -117,7 +117,7 @@ void HostZoomMap::SetZoomLevel(const GURL& url, double level) {
 
   NotificationService::current()->Notify(NotificationType::ZOOM_LEVEL_CHANGED,
                                          Source<Profile>(profile_),
-                                         NotificationService::NoDetails());
+                                         Details<int>(&request_id));
 
   // If we're in incognito mode, don't persist changes to the prefs.  We'll keep
   // them in memory only so they will be forgotten on exiting incognito.
@@ -153,6 +153,7 @@ double HostZoomMap::GetTemporaryZoomLevel(int render_process_id,
 
 void HostZoomMap::SetTemporaryZoomLevel(int render_process_id,
                                         int render_view_id,
+                                        int request_id,
                                         double level) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!profile_)
@@ -184,7 +185,7 @@ void HostZoomMap::SetTemporaryZoomLevel(int render_process_id,
 
   NotificationService::current()->Notify(NotificationType::ZOOM_LEVEL_CHANGED,
                                          Source<Profile>(profile_),
-                                         NotificationService::NoDetails());
+                                         Details<int>(&request_id));
 }
 
 void HostZoomMap::ResetToDefaults() {