[webauthn] Fix inline bio enrollment focus

Fix the inline biometric enrollment dialog button not getting focus by
default.

Fixed: 1097311
Change-Id: I58cf4492287b68cc7ce5bb3f6980e65d3caebd80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2255101
Commit-Queue: Nina Satragno <nsatragno@chromium.org>
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Auto-Submit: Nina Satragno <nsatragno@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#780480}

chrome/browser/ui/views/webauthn/authenticator_bio_enrollment_sheet_view.cc

@@ -30,6 +30,10 @@ AuthenticatorBioEnrollmentSheetView::AuthenticatorBioEnrollmentSheetView(
 AuthenticatorBioEnrollmentSheetView::~AuthenticatorBioEnrollmentSheetView() =
     default;
 
+views::View* AuthenticatorBioEnrollmentSheetView::GetInitiallyFocusedView() {
+  return nullptr;
+}
+
 std::unique_ptr<views::View>
 AuthenticatorBioEnrollmentSheetView::BuildStepSpecificContent() {
   auto* bio_model = static_cast<AuthenticatorBioEnrollmentSheetModel*>(model());

chrome/browser/ui/views/webauthn/authenticator_bio_enrollment_sheet_view.h

@@ -19,6 +19,9 @@ class AuthenticatorBioEnrollmentSheetView
       std::unique_ptr<AuthenticatorBioEnrollmentSheetModel> sheet_model);
   ~AuthenticatorBioEnrollmentSheetView() override;
 
+  // AuthenticatorRequestSheetView:
+  views::View* GetInitiallyFocusedView() override;
+
  private:
   // AuthenticatorRequestSheetView:
   std::unique_ptr<views::View> BuildStepSpecificContent() override;

chrome/browser/ui/views/webauthn/authenticator_request_sheet_view.h

@@ -72,7 +72,7 @@ class AuthenticatorRequestSheetView : public views::View,
   // Returns the control on this sheet that should initially have focus instead
   // of the OK/Cancel buttons on the dialog; or returns nullptr if the regular
   // dialog button should have focus.
-  views::View* GetInitiallyFocusedView();
+  virtual views::View* GetInitiallyFocusedView();
 
   AuthenticatorRequestSheetModel* model() { return model_.get(); }