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

ui/web_dialogs/web_dialog_delegate.h

Index: ui/web_dialogs/web_dialog_delegate.h
diff --git a/ui/web_dialogs/web_dialog_delegate.h b/ui/web_dialogs/web_dialog_delegate.h
index 640dfd02ccee3a2010fe6f0db3c9760c0478aecd..e032ec013b307c2b5f48da4f3d44beb0a45a2eb9 100644
--- a/ui/web_dialogs/web_dialog_delegate.h
+++ b/ui/web_dialogs/web_dialog_delegate.h
@@ -31,6 +31,7 @@ class Size;
 }
 
 namespace ui {
+class Accelerator;
 
 // Implement this class to receive notifications.
 class WEB_DIALOGS_EXPORT WebDialogDelegate {
@@ -137,6 +138,12 @@ class WEB_DIALOGS_EXPORT WebDialogDelegate {
   // Stores the dialog bounds.
   virtual void StoreDialogSize(const gfx::Size& dialog_size) {}
 
+  // Returns the accelerators that can be processed to this dialog.

[sky, 2017/05/11 15:04:11]

Returns the accelerators handled by the delegate.

[Qiang(Joe) Xu, 2017/05/12 21:50:45]

Done.

+  virtual std::vector<Accelerator> GetAccelerators();
+
+  // Returns true if |accelerator| pressed is processed, otherwise false.

[sky, 2017/05/11 15:04:11]

remove 'pressed'.

[Qiang(Joe) Xu, 2017/05/12 21:50:45]

Done.

+  virtual bool AcceleratorPressed(const Accelerator& accelerator);
+
   virtual ~WebDialogDelegate() {}
 };