Use a new Supplement constructor in Navigator supplements (part 2)

third_party/WebKit/Source/modules/webusb/NavigatorUSB.cpp

Index: third_party/WebKit/Source/modules/webusb/NavigatorUSB.cpp
diff --git a/third_party/WebKit/Source/modules/webusb/NavigatorUSB.cpp b/third_party/WebKit/Source/modules/webusb/NavigatorUSB.cpp
index fa49c7d47b2aeaf70af53b024b97f9496f619c5e..449f759333e280850717efe23b69ce1dfff27787 100644
--- a/third_party/WebKit/Source/modules/webusb/NavigatorUSB.cpp
+++ b/third_party/WebKit/Source/modules/webusb/NavigatorUSB.cpp
@@ -32,7 +32,8 @@ DEFINE_TRACE(NavigatorUSB) {
   Supplement<Navigator>::trace(visitor);
 }
 
-NavigatorUSB::NavigatorUSB(Navigator& navigator) {
+NavigatorUSB::NavigatorUSB(Navigator& navigator)
+    : Supplement<Navigator>(navigator) {
   if (navigator.frame())
     m_usb = USB::create(*navigator.frame());
 }