Add automation call to wait for multiple navigations.

chrome/test/automation/automation_messages_internal.h

Index: chrome/test/automation/automation_messages_internal.h
diff --git a/chrome/test/automation/automation_messages_internal.h b/chrome/test/automation/automation_messages_internal.h
index 5ebaca0cdbd34a017c9d8c153cfa67af930ef43b..5309298459d2f59aa5d7edd7d45e4dcc0df41560 100644
--- a/chrome/test/automation/automation_messages_internal.h
+++ b/chrome/test/automation/automation_messages_internal.h
@@ -82,6 +82,7 @@ IPC_BEGIN_MESSAGES(Automation)
   // the tab resource. The second parameter is the target url.  The return
   // value contains a status code which is nonnegative on success.
   // See AutomationMsg_NavigationResponseValues for the return value.
+  // TODO(phajdan.jr): Remove when the reference build gets updated.
   IPC_SYNC_MESSAGE_ROUTED2_1(AutomationMsg_NavigateToURL, int, GURL,
                              AutomationMsg_NavigationResponseValues)
 
@@ -1008,4 +1009,14 @@ IPC_BEGIN_MESSAGES(Automation)
   IPC_MESSAGE_ROUTED3(AutomationMsg_WindowClick, int, gfx::Point, int)
 #endif
 
+  // This message notifies the AutomationProvider to navigate to a specified
+  // url in the tab with given handle. The first parameter is the handle to
+  // the tab resource. The second parameter is the target url.  The third
+  // parameter is the number of navigations that are required for a successful
+  // return value. See AutomationMsg_NavigationResponseValues for the return
+  // value.
+  IPC_SYNC_MESSAGE_ROUTED3_1(
+      AutomationMsg_NavigateToURLBlockUntilNavigationsComplete, int, GURL, int,
+      AutomationMsg_NavigationResponseValues)
+
 IPC_END_MESSAGES(Automation)