Add DCHECKs to validate ProfileIOData's list of protocols.

chrome/browser/ui/startup/startup_browser_creator_impl.cc

Index: chrome/browser/ui/startup/startup_browser_creator_impl.cc
diff --git a/chrome/browser/ui/startup/startup_browser_creator_impl.cc b/chrome/browser/ui/startup/startup_browser_creator_impl.cc
index 3a3aea13a33b8073d22daff879e45a471dee66d8..b63b0347938807a59670572623cc97cc4a7e2fa6 100644
--- a/chrome/browser/ui/startup/startup_browser_creator_impl.cc
+++ b/chrome/browser/ui/startup/startup_browser_creator_impl.cc
@@ -424,15 +424,18 @@ Browser* StartupBrowserCreatorImpl::OpenTabsInBrowser(Browser* browser,
     browser = new Browser(Browser::CreateParams(profile_));
 
   bool first_tab = true;
-  ProtocolHandlerRegistry* registry = profile_ ?
-      ProtocolHandlerRegistryFactory::GetForBrowserContext(profile_) : NULL;
+  ProtocolHandlerRegistry* web_based_protocol_handlers =
+      profile_ ? ProtocolHandlerRegistryFactory::GetForBrowserContext(profile_)
+               : NULL;
   for (size_t i = 0; i < tabs.size(); ++i) {
     // We skip URLs that we'd have to launch an external protocol handler for.
     // This avoids us getting into an infinite loop asking ourselves to open
     // a URL, should the handler be (incorrectly) configured to be us. Anyone
     // asking us to open such a URL should really ask the handler directly.
-    bool handled_by_chrome = ProfileIOData::IsHandledURL(tabs[i].url) ||
-        (registry && registry->IsHandledProtocol(tabs[i].url.scheme()));
+    bool handled_by_chrome =
+        ProfileIOData::HasBuiltInProtocol(tabs[i].url) ||
+        (web_based_protocol_handlers &&
+         web_based_protocol_handlers->IsHandledProtocol(tabs[i].url.scheme()));
     if (!process_startup && !handled_by_chrome)
       continue;