Zoom Extension API (chrome)

chrome/browser/extensions/api/tabs/tabs_event_router.cc

Index: chrome/browser/extensions/api/tabs/tabs_event_router.cc
diff --git a/chrome/browser/extensions/api/tabs/tabs_event_router.cc b/chrome/browser/extensions/api/tabs/tabs_event_router.cc
index 4e93b4060ddfa55a858668828c5b4f6b45987495..beb0d3a07d9c4b017e86feb5dd5fbadb3cc47f00 100644
--- a/chrome/browser/extensions/api/tabs/tabs_event_router.cc
+++ b/chrome/browser/extensions/api/tabs/tabs_event_router.cc
@@ -552,4 +552,33 @@ void TabsEventRouter::TabPinnedStateChanged(WebContents* contents, int index) {
   }
 }
 
+void TabsEventRouter::OnZoomChangeInitiated(
+    content::WebContents* web_contents,
+    double old_zoom_level,
+    double new_zoom_level,
+    ZoomController::ZoomMode zoom_mode) {
+  DCHECK(web_contents);
+  int tab_id = ExtensionTabUtil::GetTabId(web_contents);
+  if (tab_id < 0)
+    return;
+
+  // Prepare the zoom change information.
+  api::tabs::OnZoomChange::ZoomChangeInfo zoom_change_info;
+  zoom_change_info.tab_id = tab_id;
+  zoom_change_info.old_zoom_factor =
+      content::ZoomLevelToZoomFactor(old_zoom_level);
+  zoom_change_info.new_zoom_factor =
+      content::ZoomLevelToZoomFactor(new_zoom_level);
+  ZoomModeToZoomSettings(zoom_mode,
+                         &zoom_change_info.zoom_settings);
+
+  // Dispatch the |onZoomChange| event.
+  Profile* profile = Profile::FromBrowserContext(
+      web_contents->GetBrowserContext());
+  DispatchEvent(profile,
+                tabs::OnZoomChange::kEventName,
+                api::tabs::OnZoomChange::Create(zoom_change_info),
+                EventRouter::USER_GESTURE_UNKNOWN);
+}
+
 }  // namespace extensions