Change WebBluetooth chooser OK button's label to be "Pair"

chrome/browser/usb/usb_chooser_controller.cc

Index: chrome/browser/usb/usb_chooser_controller.cc
diff --git a/chrome/browser/usb/usb_chooser_controller.cc b/chrome/browser/usb/usb_chooser_controller.cc
index e6ce755afede3be61e8358896fba409d0b1ae9b8..b85cad5b0355bf40afcac3f2c937d5851d8c7244 100644
--- a/chrome/browser/usb/usb_chooser_controller.cc
+++ b/chrome/browser/usb/usb_chooser_controller.cc
@@ -71,6 +71,10 @@ UsbChooserController::~UsbChooserController() {
     callback_.Run(nullptr);
 }
 
+base::string16 UsbChooserController::GetOkButtonLabel() const {
+  return l10n_util::GetStringUTF16(IDS_USB_DEVICE_CHOOSER_CONNECT_BUTTON_TEXT);
+}
+
 size_t UsbChooserController::NumOptions() const {
   return devices_.size();
 }