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

chrome/browser/chooser_controller/chooser_controller.cc

Index: chrome/browser/chooser_controller/chooser_controller.cc
diff --git a/chrome/browser/chooser_controller/chooser_controller.cc b/chrome/browser/chooser_controller/chooser_controller.cc
index dd27d086dead936086029705d4a75bb3ced7373f..6beb42b783298bec2c4a3cb351098f995a89670b 100644
--- a/chrome/browser/chooser_controller/chooser_controller.cc
+++ b/chrome/browser/chooser_controller/chooser_controller.cc
@@ -27,6 +27,10 @@ base::string16 ChooserController::GetTitle() {
       GetTitlePrefix());
 }
 
+base::string16 ChooserController::GetOkButtonLabel() const {
+  return base::string16();
+}
+
 base::string16 ChooserController::GetTitlePrefix() {
   if (!owning_frame_)
     return base::string16();