Revert "Refactor automation messages." due to mysterious problems on mac.

chrome/browser/tab_contents/interstitial_page.cc

Index: chrome/browser/tab_contents/interstitial_page.cc
diff --git a/chrome/browser/tab_contents/interstitial_page.cc b/chrome/browser/tab_contents/interstitial_page.cc
index 8705e6294d40fecdf873f09fe7b4975d17c0de18..ae1e078ed683cd9437e908bc6397a181613101f3 100644
--- a/chrome/browser/tab_contents/interstitial_page.cc
+++ b/chrome/browser/tab_contents/interstitial_page.cc
@@ -223,7 +223,7 @@ void InterstitialPage::Show() {
     NavigationEntry* entry = new NavigationEntry;
     entry->set_url(url_);
     entry->set_virtual_url(url_);
-    entry->set_page_type(INTERSTITIAL_PAGE);
+    entry->set_page_type(NavigationEntry::INTERSTITIAL_PAGE);
 
     // Give sub-classes a chance to set some states on the navigation entry.
     UpdateEntry(entry);