Update a comment with a link to a historic source.

chrome/browser/translate/translate_manager_render_view_host_unittest.cc

 // Copyright 2014 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 <algorithm>
 #include <set>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 876 matching lines @@
 
   EXPECT_TRUE(CloseTranslateInfoBar());
 
   content::RenderFrameHostTester* subframe_tester =
       content::RenderFrameHostTester::For(
           content::RenderFrameHostTester::For(main_rfh())
               ->AppendChild("subframe"));
 
   // Simulate a sub-frame auto-navigating.
   subframe_tester->SendNavigateWithTransition(
-      1, GURL("http://pub.com"), ui::PAGE_TRANSITION_AUTO_SUBFRAME);
+      0, GURL("http://pub.com"), ui::PAGE_TRANSITION_AUTO_SUBFRAME);
   EXPECT_TRUE(GetTranslateInfoBar() == NULL);
 
   // Simulate the user navigating in a sub-frame.
   subframe_tester->SendNavigateWithTransition(
-      2, GURL("http://pub.com"), ui::PAGE_TRANSITION_MANUAL_SUBFRAME);
+      1, GURL("http://pub.com"), ui::PAGE_TRANSITION_MANUAL_SUBFRAME);
   EXPECT_TRUE(GetTranslateInfoBar() == NULL);
 
   // Navigate out of page, a new infobar should show.
   SimulateNavigation(GURL("http://www.google.fr/foot"), "fr", true);
   EXPECT_TRUE(GetTranslateInfoBar() != NULL);
 }
 
 // Tests that denying translation is sticky when navigating in page.
 TEST_F(TranslateManagerRenderViewHostTest, DenyTranslateInPageNavigation) {
   // TODO(port): Test corresponding bubble translate UX: http://crbug.com/383235
@@ skipping 756 matching lines @@
   menu->ExecuteCommand(IDC_CONTENT_CONTEXT_TRANSLATE, 0);
 
   // Check the bubble exists instead of the infobar.
   translate::TranslateInfoBarDelegate* infobar = GetTranslateInfoBar();
   ASSERT_TRUE(infobar == NULL);
   TranslateBubbleModel* bubble = factory->model();
   ASSERT_TRUE(bubble != NULL);
   EXPECT_EQ(TranslateBubbleModel::VIEW_STATE_TRANSLATING,
             bubble->GetViewState());
 }