Allow "cross-origin" navigations from about:blank in AreURLsInPageNavigation

content/browser/frame_host/navigation_controller_impl_unittest.cc

 // Copyright 2013 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
@@ skipping 3097 matching lines @@
   // Going back to the non ref url will be considered in-page if the navigation
   // type is IN_PAGE.
   EXPECT_TRUE(controller.IsURLInPageNavigation(url, true,
       main_test_rfh()));
 
   // If the renderer says this is a same-origin in-page navigation, believe it.
   // This is the pushState/replaceState case.
   EXPECT_TRUE(controller.IsURLInPageNavigation(other_url, true,
       main_test_rfh()));
 
+  // If the renderer navigates from about:blank, believe it. This can happen
+  // when an iframe is created and populated via document.write(), then tries
+  // to perform a fragment navigation.
+  const GURL blank_url(url::kAboutBlankURL);
+  main_test_rfh()->SendNavigate(0, blank_url);
+  EXPECT_TRUE(controller.IsURLInPageNavigation(other_url, true,
+      main_test_rfh()));
+  main_test_rfh()->SendNavigate(0, url);
+
   // Don't believe the renderer if it claims a cross-origin navigation is
   // in-page.
   const GURL different_origin_url("http://www.example.com");
   MockRenderProcessHost* rph =
       static_cast<MockRenderProcessHost*>(main_test_rfh()->GetProcess());
   EXPECT_EQ(0, rph->bad_msg_count());
   EXPECT_FALSE(controller.IsURLInPageNavigation(different_origin_url, true,
       main_test_rfh()));
   EXPECT_EQ(1, rph->bad_msg_count());
 }
@@ skipping 1197 matching lines @@
   params.post_id = -1;
   test_rvh()->SendNavigateWithParams(&params);
 
   // Now reload. replaceState overrides the POST, so we should not show a
   // repost warning dialog.
   controller_impl().Reload(true);
   EXPECT_EQ(0, delegate->repost_form_warning_count());
 }
 
 }  // namespace content