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 3054 matching lines @@
   EXPECT_TRUE(controller.GetVisibleEntry());
   EXPECT_EQ(url1, controller.GetVisibleEntry()->GetURL());
 
   notifications.Reset();
 }
 
 // Tests that IsInPageNavigation returns appropriate results.  Prevents
 // regression for bug 1126349.
 TEST_F(NavigationControllerTest, IsInPageNavigation) {
   NavigationControllerImpl& controller = controller_impl();
+  const GURL url("http://www.google.com/home.html");
+
+  // If the renderer claims it performed an in-page navigation from
+  // about:blank, trust the renderer.
+  // This can happen when an iframe is created and populated via
+  // document.write(), then tries to perform a fragment navigation.
+  // TODO(japhet): We should only trust the renderer if the about:blank
+  // was the first document in the given frame, but we don't have enough
+  // information to identify that case currently.
+  const GURL blank_url(url::kAboutBlankURL);
+  main_test_rfh()->SendNavigate(0, blank_url);
+  EXPECT_TRUE(controller.IsURLInPageNavigation(url, true,
+      main_test_rfh()));
+
   // Navigate to URL with no refs.
-  const GURL url("http://www.google.com/home.html");
   main_test_rfh()->SendNavigate(0, url);
 
   // Reloading the page is not an in-page navigation.
   EXPECT_FALSE(controller.IsURLInPageNavigation(url, false,
       main_test_rfh()));
   const GURL other_url("http://www.google.com/add.html");
   EXPECT_FALSE(controller.IsURLInPageNavigation(other_url, false,
       main_test_rfh()));
   const GURL url_with_ref("http://www.google.com/home.html#my_ref");
   EXPECT_TRUE(controller.IsURLInPageNavigation(url_with_ref, true,
@@ skipping 1238 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