Fix clang build break

chrome/browser/chromeos/input_method/input_method_engine.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/chromeos/input_method/input_method_engine.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_util.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/input_method/ibus_engine_controller.h"
 #include "chrome/browser/chromeos/input_method/ibus_keymap.h"
 #include "chrome/browser/chromeos/input_method/input_method_manager.h"
 #include "chrome/browser/chromeos/input_method/input_method_util.h"
 
 namespace chromeos {
 
 const char* kExtensionImePrefix = "_ext_ime_";
 const char* kErrorNotActive = "IME is not active";
 const char* kErrorWrongContext = "Context is not active";
 
+InputMethodEngine::KeyboardEvent::KeyboardEvent() {
+}
+
+InputMethodEngine::KeyboardEvent::~KeyboardEvent() {
+}
+
+InputMethodEngine::MenuItem::MenuItem() {
+}
+
+InputMethodEngine::MenuItem::~MenuItem() {
+}
+
+InputMethodEngine::Candidate::Candidate() {
+}
+
+InputMethodEngine::Candidate::~Candidate() {
+}
+
 InputMethodEngine::Observer::~Observer() {
 }
 
 class InputMethodEngineImpl
     : public InputMethodEngine,
       public input_method::IBusEngineController::Observer {
  public:
   InputMethodEngineImpl()
       : observer_(NULL), active_(false), next_context_id_(1),
         context_id_(-1) {}
@@ skipping 357 matching lines @@
   } else if (button & input_method::IBusEngineController::MOUSE_BUTTON_2_MASK) {
     pressed_button = MOUSE_BUTTON_MIDDLE;
   } else if (button & input_method::IBusEngineController::MOUSE_BUTTON_3_MASK) {
     pressed_button = MOUSE_BUTTON_RIGHT;
   }
 
   observer_->OnCandidateClicked(engine_id_, candidate_ids_.at(index), button);
 }
 
 }  // namespace chromeos