Last part of change for bug 49747....

chrome/browser/ui/app_modal_dialogs/js_modal_dialog.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/ui/app_modal_dialogs/js_modal_dialog.h"
 
 #include "app/text_elider.h"
 #include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/app_modal_dialogs/native_app_modal_dialog.h"
 #include "chrome/common/notification_service.h"
 #include "chrome/common/notification_type.h"
 #include "ipc/ipc_message.h"
 
 namespace {
 
 // The maximum sizes of various texts passed to us from javascript.
-const int kMessageTextMaxSize = 3000;
+const int kMessageTextMaxRows = 32;
+const int kMessageTextMaxCols = 132;
 const int kDefaultPromptTextSize = 2000;
 
 }  // namespace
 
 JavaScriptAppModalDialog::JavaScriptAppModalDialog(
     JavaScriptAppModalDialogDelegate* delegate,
     const std::wstring& title,
     int dialog_flags,
     const std::wstring& message_text,
     const std::wstring& default_prompt_text,
     bool display_suppress_checkbox,
     bool is_before_unload_dialog,
     IPC::Message* reply_msg)
     : AppModalDialog(delegate->AsTabContents(), title),
       delegate_(delegate),
       extension_host_(delegate->AsExtensionHost()),
       dialog_flags_(dialog_flags),
       display_suppress_checkbox_(display_suppress_checkbox),
       is_before_unload_dialog_(is_before_unload_dialog),
       reply_msg_(reply_msg) {
   // We trim the various parts of the message dialog because otherwise we can
   // overflow the message dialog (and crash/hang the GTK+ version).
-  gfx::ElideString(message_text, kMessageTextMaxSize, &message_text_);
+  string16 elided_text;
+  gfx::ElideRectangleString(WideToUTF16(message_text),
+       kMessageTextMaxRows, kMessageTextMaxCols, &elided_text);
+  message_text_ = UTF16ToWide(elided_text);
   gfx::ElideString(default_prompt_text, kDefaultPromptTextSize,
                    &default_prompt_text_);
 
   DCHECK((tab_contents_ != NULL) != (extension_host_ != NULL));
   InitNotifications();
 }
 
 JavaScriptAppModalDialog::~JavaScriptAppModalDialog() {
 }
 
@@ skipping 77 matching lines @@
     return;
 
   delegate_->OnMessageBoxClosed(reply_msg_, success, prompt_text);
   if (suppress_js_messages)
     delegate_->SetSuppressMessageBoxes(true);
 
   // On Views, we can end up coming through this code path twice :(.
   // See crbug.com/63732.
   skip_this_dialog_ = true;
 }