linux_aura: Port GtkKeybindingsHandler to Aura.

content/public/browser/keybinding_handler_aurax11.h

+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_PUBLIC_BROWSER_KEYBINDING_HANDLER_AURAX11_H_
+#define CONTENT_PUBLIC_BROWSER_KEYBINDING_HANDLER_AURAX11_H_
+
+#include "content/common/content_export.h"
+#include "content/public/common/edit_command.h"
+
+namespace content {
+
+struct NativeWebKeyboardEvent;
+
+// On Linux Aura, we need a way for the LinuxUI object to translate key
+// commands to the native content area.
+class CONTENT_EXPORT KeybindingHandlerAuraX11 {

[piman, 2014/03/26 23:44:26]

Could it make sense to have this and the other classes at a lower level, e.g.
aura?
1- to not expand the content API unnecessarily
2- so that this could be reused in other places, say the omnibox

+ public:
+  virtual ~KeybindingHandlerAuraX11() {}
+
+  // Matches a key event against predefined gtk key bindings, false will be
+  // returned if the key event doesn't correspond to a predefined key binding.
+  // Edit commands matched with |wke| will be stored in |edit_commands|.
+  virtual bool Match(const NativeWebKeyboardEvent& wke,
+                     EditCommands* edit_commands) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_KEYBINDING_HANDLER_AURAX11_H_