Perform redirect checks before OnReceivedRedirect in //net.

content/browser/frame_host/navigation_controller_impl_browsertest.cc

Index: content/browser/frame_host/navigation_controller_impl_browsertest.cc
diff --git a/content/browser/frame_host/navigation_controller_impl_browsertest.cc b/content/browser/frame_host/navigation_controller_impl_browsertest.cc
index 80adea69abf40ba8baa319e938ea135276deeaed..098419a7b70ae18bea0a873254e2cd2280d85b69 100644
--- a/content/browser/frame_host/navigation_controller_impl_browsertest.cc
+++ b/content/browser/frame_host/navigation_controller_impl_browsertest.cc
@@ -6861,11 +6861,14 @@ IN_PROC_BROWSER_TEST_F(NavigationControllerBrowserTest,
 
   // The expectation is that about:blank was loaded and the virtual URL is set
   // to the URL that was blocked.
+  //
+  // TODO(nasko): Now that the error commits on the previous URL, the blocked
+  // navigation logic is no longer needed.
   EXPECT_EQ(1, controller.GetLastCommittedEntryIndex());
   EXPECT_FALSE(
       controller.GetLastCommittedEntry()->GetURL().SchemeIs(url::kDataScheme));
-  EXPECT_TRUE(controller.GetLastCommittedEntry()->GetVirtualURL().SchemeIs(
-      url::kDataScheme));
+  EXPECT_EQ(redirect_to_blank_url,

[nasko, 2017/06/06 00:27:38]

Let's rename this, redirect_to_unsafe_redirect is probably more descriptive and
reflects what it really does.

[davidben, 2017/06/06 17:31:08]

Done.

+            controller.GetLastCommittedEntry()->GetVirtualURL());
   EXPECT_EQ(url::kAboutBlankURL,
             controller.GetLastCommittedEntry()->GetURL().spec());
 }