Add a KeyboardLayoutEngine::SetCurrentLayoutFromBuffer implementation

ui/events/ozone/layout/keyboard_layout_engine.h

 // Copyright 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 UI_OZONE_PUBLIC_KEYBOARD_LAYOUT_ENGINE_H_
 #define UI_OZONE_PUBLIC_KEYBOARD_LAYOUT_ENGINE_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
@@ skipping 19 matching lines @@
   virtual ~KeyboardLayoutEngine() {}
 
   // Returns true if it is possible to change the current layout.
   virtual bool CanSetCurrentLayout() const = 0;
 
   // Sets the current layout; returns true on success.
   // Drop-in replacement for ImeKeyboard::SetCurrentKeyboardLayoutByName();
   // the argument string is defined by that interface (crbug.com/362698).
   virtual bool SetCurrentLayoutByName(const std::string& layout_name) = 0;
 
+  // Sets the current layout given a keyboard mapping description;
+  // Returns true on success.
+  virtual bool SetCurrentLayoutFromString(const std::string&) = 0;
+
   // Returns true if the current layout makes use of the ISO Level 5 Shift key.
   // Drop-in replacement for ImeKeyboard::IsISOLevel5ShiftAvailable().
   virtual bool UsesISOLevel5Shift() const = 0;
 
   // Returns true if the current layout makes use of the AltGr
   // (ISO Level 3 Shift) key.
   // Drop-in replacement for ImeKeyboard::IsAltGrAvailable().
   virtual bool UsesAltGr() const = 0;
 
   // Provides the meaning of a physical key.
@@ skipping 13 matching lines @@
   // parameters.
   virtual bool Lookup(DomCode dom_code,
                       int event_flags,
                       DomKey* dom_key,
                       KeyboardCode* key_code) const = 0;
 };
 
 }  // namespace ui
 
 #endif  // UI_OZONE_PUBLIC_KEYBOARD_LAYOUT_ENGINE_H_