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

ui/web_dialogs/web_dialog_delegate.cc

Index: ui/web_dialogs/web_dialog_delegate.cc
diff --git a/ui/web_dialogs/web_dialog_delegate.cc b/ui/web_dialogs/web_dialog_delegate.cc
index e4895f174fc155891573513930b9acbc3df7ea68..4a66b10572bc9316f2600a443ca507ac8784b0e3 100644
--- a/ui/web_dialogs/web_dialog_delegate.cc
+++ b/ui/web_dialogs/web_dialog_delegate.cc
@@ -4,6 +4,8 @@
 
 #include "ui/web_dialogs/web_dialog_delegate.h"
 
+#include "ui/base/accelerators/accelerator.h"
+
 namespace ui {
 
 std::string WebDialogDelegate::GetDialogName() const {
@@ -52,4 +54,12 @@ bool WebDialogDelegate::HandleShouldCreateWebContents() {
   return true;
 }
 
+std::vector<Accelerator> WebDialogDelegate::GetAccelerators() {
+  return {};
+}
+
+bool WebDialogDelegate::AcceleratorPressed(const Accelerator& accelerator) {
+  return false;
+}
+
 }  // namespace ui