Added documentation, restructured the files to fit better with electron's style and fixed a typo in keyboard_util's name.

atom/common/keyboard_util.h

@@ -0,0 +1,23 @@
+// Copyright (c) 2015 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_COMMON_KEYBOARD_UTIL_H_
+#define ATOM_COMMON_KEYBOARD_UTIL_H_
+
+#include <string>
+#include "ui/events/keycodes/keyboard_codes.h"
+#include "base/strings/string_util.h"
+
+namespace atom {
+
+// Return key code of the char, and also determine whether the SHIFT key is
+// pressed.
+ui::KeyboardCode KeyboardCodeFromCharCode(base::char16 c, bool* shifted);
+
+// Return key code of the char from a string representation of the char
+ui::KeyboardCode KeyboardCodeFromKeyIdentifier(const std::string& chr);
+
+}  // namespace atom
+
+#endif  // ATOM_COMMON_KEYBOARD_UTIL_H_