cros: Ensure task manager shows correct title for lock screen webview

chrome/browser/chromeos/login/ui/webui_login_view.h

Index: chrome/browser/chromeos/login/ui/webui_login_view.h
diff --git a/chrome/browser/chromeos/login/ui/webui_login_view.h b/chrome/browser/chromeos/login/ui/webui_login_view.h
index 64e7c2843eb0a3b159a69db879f57878a0dafa0c..c3f3bb2b21dd1a7f7eae683cb1b40ad29d404e14 100644
--- a/chrome/browser/chromeos/login/ui/webui_login_view.h
+++ b/chrome/browser/chromeos/login/ui/webui_login_view.h
@@ -47,6 +47,10 @@ class WebUILoginView : public views::View,
   struct WebViewSettings {
     // URL of the WebView to preload and reuse across WebUILoginView instances.
     GURL preloaded_url;
+
+    // Title of the web contents. This will be shown in the task manager. If
+    // empty, the default webview title will be used.
+    base::string16 web_view_title;
   };
 
   // Internal class name.
@@ -111,7 +115,8 @@ class WebUILoginView : public views::View,
   }
 
  protected:
-  static void InitializeWebView(views::WebView* web_view);
+  static void InitializeWebView(views::WebView* web_view,
+                                const base::string16& title);
 
   // Overridden from views::View:
   void Layout() override;