cros: Bind hangup red button on remote controller to close web dialog

chrome/browser/chromeos/login/ui/login_web_dialog.cc

Index: chrome/browser/chromeos/login/ui/login_web_dialog.cc
diff --git a/chrome/browser/chromeos/login/ui/login_web_dialog.cc b/chrome/browser/chromeos/login/ui/login_web_dialog.cc
index fe8506be4ce413baef1317b43c4f2cd6b573a965..72d586f192891b2e89caa66973c8599ba75d05c2 100644
--- a/chrome/browser/chromeos/login/ui/login_web_dialog.cc
+++ b/chrome/browser/chromeos/login/ui/login_web_dialog.cc
@@ -170,4 +170,10 @@ bool LoginWebDialog::HandleShouldCreateWebContents() {
   return false;
 }
 
+bool LoginWebDialog::AdditionalAccelerator(
+    const ui::Accelerator& accelerator) const {
+  return accelerator.key_code() == ui::VKEY_BROWSER_BACK &&
+         accelerator.IsShiftDown();
+}
+
 }  // namespace chromeos