Setting chrome as the default browser is now fixed on Windows 10

chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc

Index: chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
diff --git a/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc b/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
index f246291f46b1c3ce59aa09842efc656f7e161598..759f226f32da494f3b28dde5a19c145c78476845 100644
--- a/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
+++ b/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
@@ -234,7 +234,12 @@ class FakeProtocolClientWorker
     }
   }
 
-  bool SetAsDefault(bool interactive_permitted) override { return true; }
+  void SetAsDefault(bool interactive_permitted) override {
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&FakeProtocolClientWorker::CompleteSetAsDefault, this,
+                   true));
+  }
 
  private:
   bool force_failure_;