Filters out URL clicks based on host matching only.

chrome/browser/chromeos/arc/arc_navigation_throttle.cc

Index: chrome/browser/chromeos/arc/arc_navigation_throttle.cc
diff --git a/chrome/browser/chromeos/arc/arc_navigation_throttle.cc b/chrome/browser/chromeos/arc/arc_navigation_throttle.cc
index 3e3a3abe8a00cdb53d13b0997a9b216add21a3dc..2fd1e00c838cffb3b4b5c7c84a34aa6e23ff06ea 100644
--- a/chrome/browser/chromeos/arc/arc_navigation_throttle.cc
+++ b/chrome/browser/chromeos/arc/arc_navigation_throttle.cc
@@ -13,6 +13,7 @@
 #include "components/arc/intent_helper/arc_intent_helper_bridge.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_handle.h"
+#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
 
 namespace arc {
 
@@ -65,6 +66,9 @@ ArcNavigationThrottle::WillStartRequest() {
   if (!navigation_handle()->HasUserGesture())
     return content::NavigationThrottle::PROCEED;
 
+  if (!ShouldOverrideUrlLoading(navigation_handle()))
+    return content::NavigationThrottle::PROCEED;
+
   const GURL& url = navigation_handle()->GetURL();
   mojom::IntentHelperInstance* bridge_instance = GetIntentHelper();
   if (!bridge_instance)
@@ -207,4 +211,15 @@ void ArcNavigationThrottle::OnDisambigDialogClosed(
                             static_cast<int>(CloseReason::SIZE));
 }
 
+bool ArcNavigationThrottle::ShouldOverrideUrlLoading(
+    content::NavigationHandle* navigation_handle) {
+  GURL previous_url = navigation_handle->GetReferrer().url;
+  GURL current_url = navigation_handle->GetURL();
+  if (net::registry_controlled_domains::SameDomainOrHost(
+          current_url, previous_url,
+          net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES))
+    return false;
+  return true;
+}
+
 }  // namespace arc