Pass accessible location change messages to the automation API.

content/public/browser/web_contents_observer.h

Index: content/public/browser/web_contents_observer.h
diff --git a/content/public/browser/web_contents_observer.h b/content/public/browser/web_contents_observer.h
index b72cef60d529b665f8c4099edc125b951bad3e9c..e2c42d0eefd9afc07bb09af1a0415f35dff06e6e 100644
--- a/content/public/browser/web_contents_observer.h
+++ b/content/public/browser/web_contents_observer.h
@@ -33,6 +33,7 @@ class RenderWidgetHost;
 class WebContents;
 class WebContentsImpl;
 struct AXEventNotificationDetails;
+struct AXLocationChangeNotificationDetails;
 struct FaviconURL;
 struct FrameNavigateParams;
 struct LoadCommittedDetails;
@@ -450,6 +451,11 @@ class CONTENT_EXPORT WebContentsObserver : public IPC::Listener,
   virtual void AccessibilityEventReceived(
       const std::vector<AXEventNotificationDetails>& details) {}
 
+  // Invoked when an accessibility location change is received from the
+  // renderer process.
+  virtual void AccessibilityLocationChangesReceived(
+      const std::vector<AXLocationChangeNotificationDetails>& details) {}
+
   // Invoked when theme color is changed to |theme_color|.
   virtual void DidChangeThemeColor(SkColor theme_color) {}