diff -up chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_ptr_info.h.boolfix chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_ptr_info.h
--- chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_ptr_info.h.boolfix	2019-09-09 23:55:20.000000000 +0200
+++ chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_ptr_info.h	2019-09-12 15:43:30.025360946 +0200
@@ -45,7 +45,7 @@ class AssociatedInterfacePtrInfo {
 
   bool is_valid() const { return handle_.is_valid(); }
 
-  explicit operator bool() const { return handle_.is_valid(); }
+  explicit operator bool() const { return (bool) handle_.is_valid(); }
 
   ScopedInterfaceEndpointHandle PassHandle() {
     return std::move(handle_);
diff -up chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_request.h.boolfix chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_request.h
--- chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_request.h.boolfix	2019-09-09 23:55:20.000000000 +0200
+++ chromium-77.0.3865.75/mojo/public/cpp/bindings/associated_interface_request.h	2019-09-12 15:43:30.025360946 +0200
@@ -51,7 +51,7 @@ class AssociatedInterfaceRequest {
   // handle.
   bool is_pending() const { return handle_.is_valid(); }
 
-  explicit operator bool() const { return handle_.is_valid(); }
+  explicit operator bool() const { return (bool) handle_.is_valid(); }
 
   ScopedInterfaceEndpointHandle PassHandle() { return std::move(handle_); }