[WIP] Fix history.replaceState() not propagating back favicons

chrome/browser/favicon/content_favicon_driver_browsertest.cc

Index: chrome/browser/favicon/content_favicon_driver_browsertest.cc
diff --git a/chrome/browser/favicon/content_favicon_driver_browsertest.cc b/chrome/browser/favicon/content_favicon_driver_browsertest.cc
index 539aacec46565c1bd45023fa00a1e5291a8aebe6..fc8501097a76e178d2db9dfa396eeb9c7840a742 100644
--- a/chrome/browser/favicon/content_favicon_driver_browsertest.cc
+++ b/chrome/browser/favicon/content_favicon_driver_browsertest.cc
@@ -443,6 +443,29 @@ IN_PROC_BROWSER_TEST_F(
       GetFaviconForPageURL(landing_url, favicon_base::FAVICON).bitmap_data);
 }
 
+// Test that a page which uses JavaScript's history.replaceState() to update
+// the URL in the omnibox (and history) gets associated favicons.
+IN_PROC_BROWSER_TEST_F(ContentFaviconDriverTest,
+                       AssociateIconWithInitialPageIconDespiteReplaceState) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+  GURL url =
+      embedded_test_server()->GetURL("/favicon/replacestate_with_favicon.html");
+  GURL replacestate_url = embedded_test_server()->GetURL(
+      "/favicon/replacestate_with_favicon_replaced.html");
+
+  PendingTaskWaiter waiter(web_contents(), replacestate_url);
+  ui_test_utils::NavigateToURLWithDisposition(
+      browser(), url, WindowOpenDisposition::CURRENT_TAB,
+      ui_test_utils::BROWSER_TEST_NONE);
+  waiter.Wait();
+
+  EXPECT_NE(nullptr,
+            GetFaviconForPageURL(url, favicon_base::FAVICON).bitmap_data);
+  EXPECT_NE(nullptr,
+            GetFaviconForPageURL(replacestate_url, favicon_base::FAVICON)
+                .bitmap_data);
+}
+
 #if defined(OS_ANDROID)
 IN_PROC_BROWSER_TEST_F(ContentFaviconDriverTest,
                        LoadIconFromWebManifestDespitePushState) {