Remove the ability of webpages to specify strings for the onbeforeunload dialog.

content/browser/frame_host/render_frame_host_manager_unittest.cc

Index: content/browser/frame_host/render_frame_host_manager_unittest.cc
diff --git a/content/browser/frame_host/render_frame_host_manager_unittest.cc b/content/browser/frame_host/render_frame_host_manager_unittest.cc
index b09d94569f9a4d9fc6f93997f4552b1493e891d4..f66c758dd559079e6e51fbad48c0e71ca0a62e72 100644
--- a/content/browser/frame_host/render_frame_host_manager_unittest.cc
+++ b/content/browser/frame_host/render_frame_host_manager_unittest.cc
@@ -669,16 +669,16 @@ TEST_F(RenderFrameHostManagerTest, FilterMessagesWhileSwappedOut) {
   // without showing an actual dialog.
   MockRenderProcessHost* ntp_process_host = ntp_rfh->GetProcess();
   ntp_process_host->sink().ClearMessages();
-  const base::string16 msg = base::ASCIIToUTF16("Message");
   bool result = false;
   base::string16 unused;
   FrameHostMsg_RunBeforeUnloadConfirm before_unload_msg(
-      ntp_rfh->GetRoutingID(), kChromeURL, msg, false, &result, &unused);
+      ntp_rfh->GetRoutingID(), kChromeURL, false, &result, &unused);
   EXPECT_TRUE(ntp_rfh->OnMessageReceived(before_unload_msg));
   EXPECT_TRUE(ntp_process_host->sink().GetUniqueMessageMatching(IPC_REPLY_ID));
 
   // Also test RunJavaScriptMessage.
   ntp_process_host->sink().ClearMessages();
+  const base::string16 msg = base::ASCIIToUTF16("Message");
   FrameHostMsg_RunJavaScriptMessage js_msg(
       ntp_rfh->GetRoutingID(), msg, msg, kChromeURL,
       JAVASCRIPT_MESSAGE_TYPE_CONFIRM, &result, &unused);