Add instrumentation to detect the type of login actions being added.

chrome/browser/prerender/prerender_tab_helper.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
 #define CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
@@ skipping 16 matching lines @@
       public content::WebContentsUserData<PrerenderTabHelper> {
  public:
   enum Event {
     EVENT_LOGGED_IN_TABLE_REQUESTED = 0,
     EVENT_LOGGED_IN_TABLE_PRESENT = 1,
     EVENT_MAINFRAME_CHANGE = 2,
     EVENT_MAINFRAME_CHANGE_DOMAIN_LOGGED_IN = 3,
     EVENT_MAINFRAME_COMMIT = 4,
     EVENT_MAINFRAME_COMMIT_DOMAIN_LOGGED_IN = 5,
     EVENT_LOGIN_ACTION_ADDED = 6,
+    EVENT_LOGIN_ACTION_ADDED_MAINFRAME = 7,
+    EVENT_LOGIN_ACTION_ADDED_MAINFRAME_PW_EMPTY = 8,
+    EVENT_LOGIN_ACTION_ADDED_SUBFRAME = 9,
+    EVENT_LOGIN_ACTION_ADDED_SUBFRAME_PW_EMPTY = 10,
     EVENT_MAX_VALUE
   };
 
   virtual ~PrerenderTabHelper();
 
   // content::WebContentsObserver implementation.
   virtual void ProvisionalChangeToMainFrameUrl(
       const GURL& url,
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidStopLoading(
@@ skipping 55 matching lines @@
   GURL url_;
 
   base::WeakPtrFactory<PrerenderTabHelper> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrerenderTabHelper);
 };
 
 }  // namespace prerender
 
 #endif  // CHROME_BROWSER_PRERENDER_PRERENDER_TAB_HELPER_H_