use normal bool cast

chromium-65.0.3325.162-boolfix.patch

@@ -6,7 +6,7 @@ diff -up chromium-65.0.3325.162/mojo/public/cpp/bindings/associated_interface_pt
    bool is_valid() const { return handle_.is_valid(); }
  
 -  explicit operator bool() const { return handle_; }
-+  explicit operator bool() const { return static_cast<bool> (handle_); }
++  explicit operator bool() const { return (bool) handle_; }
  
    ScopedInterfaceEndpointHandle PassHandle() {
      return std::move(handle_);
@@ -18,7 +18,7 @@ diff -up chromium-65.0.3325.162/mojo/public/cpp/bindings/associated_interface_re
    bool is_pending() const { return handle_.is_valid(); }
  
 -  explicit operator bool() const { return handle_; }
-+  explicit operator bool() const { return static_cast<bool> (handle_); }
++  explicit operator bool() const { return (bool) handle_; }
  
    ScopedInterfaceEndpointHandle PassHandle() { return std::move(handle_); }
  
@@ -30,7 +30,7 @@ diff -up chromium-65.0.3325.162/mojo/public/cpp/bindings/interface_request.h.boo
    bool is_pending() const { return handle_.is_valid(); }
  
 -  explicit operator bool() const { return handle_; }
-+  explicit operator bool() const { return static_cast<bool> (handle_); }
++  explicit operator bool() const { return (bool) handle_; }
  
    // Removes the message pipe from the request and returns it.
    ScopedMessagePipeHandle PassMessagePipe() { return std::move(handle_); }