Change NavigationEntry to use virtual URL in error pages for blocked navigations

content/browser/frame_host/navigation_handle_impl_browsertest.cc

 // Copyright 2016 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/command_line.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_observer.h"
@@ skipping 1131 matching lines @@
         ExecuteScript(shell(), base::StringPrintf("location.href = '%s'",
                                                   blocked_url.spec().c_str())));
     navigation_observer.Wait();
     EXPECT_TRUE(observer.has_committed());
     EXPECT_TRUE(observer.is_error());
     EXPECT_EQ(site_instance,
               shell()->web_contents()->GetMainFrame()->GetSiteInstance());
   }
 
   {
-    // Reloading the page should not transfer processes.
-    NavigationHandleObserver observer(shell()->web_contents(), blocked_url);
+    // Reloading the blocked document should load about:blank and not transfer
+    // processes.
+    GURL about_blank_url(url::kAboutBlankURL);
+    NavigationHandleObserver observer(shell()->web_contents(), about_blank_url);
     TestNavigationObserver navigation_observer(shell()->web_contents(), 1);
 
     shell()->Reload();
     navigation_observer.Wait();
     EXPECT_TRUE(observer.has_committed());
-    EXPECT_TRUE(observer.is_error());
+    EXPECT_FALSE(observer.is_error());
     EXPECT_EQ(site_instance,
               shell()->web_contents()->GetMainFrame()->GetSiteInstance());
   }
 
   installer.reset();
 
   {
     // With the throttle uninstalled, going back should return to |start_url| in
     // the same process, and clear the error page.
     NavigationHandleObserver observer(shell()->web_contents(), start_url);
@@ skipping 55 matching lines @@
     NavigationHandleObserver observer(shell()->web_contents(), error_url);
     EXPECT_FALSE(NavigateToURL(shell(), error_url));
     EXPECT_TRUE(observer.has_committed());
     EXPECT_TRUE(observer.is_error());
     EXPECT_NE(site_instance,
               shell()->web_contents()->GetMainFrame()->GetSiteInstance());
   }
 }
 
 }  // namespace content