Perform redirect checks before OnReceivedRedirect in //net.

content/browser/browser_side_navigation_browsertest.cc

Index: content/browser/browser_side_navigation_browsertest.cc
diff --git a/content/browser/browser_side_navigation_browsertest.cc b/content/browser/browser_side_navigation_browsertest.cc
index 3dc6e81145437d0d8e341d21b769356765ed0c16..c3ac0cf3a22549137423bb1691c5fac31ff76498 100644
--- a/content/browser/browser_side_navigation_browsertest.cc
+++ b/content/browser/browser_side_navigation_browsertest.cc
@@ -420,11 +420,14 @@ IN_PROC_BROWSER_TEST_F(BrowserSideNavigationBrowserTest,
 
   // 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. https://crbug.com/723796
   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,
+            controller.GetLastCommittedEntry()->GetVirtualURL());
   EXPECT_EQ(url::kAboutBlankURL,
             controller.GetLastCommittedEntry()->GetURL().spec());
 }