chrome/browser/chromeos/input_method/ refactoring [part 6 of 6]

chrome/browser/chromeos/input_method/input_method_manager.cc

 // Copyright (c) 2012 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_manager.h"
 
-#include <algorithm>
-
-#include <glib.h>
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/singleton.h"
-#include "base/message_loop.h"
-#include "base/process_util.h"
-#include "base/string_split.h"
-#include "base/string_util.h"
-#include "base/stringprintf.h"
-#include "chrome/browser/browser_process.h"
-#include "chrome/browser/chromeos/input_method/browser_state_monitor.h"
-#include "chrome/browser/chromeos/input_method/input_method_util.h"
-#include "chrome/browser/chromeos/input_method/input_method_whitelist.h"
-#include "chrome/browser/chromeos/input_method/virtual_keyboard_selector.h"
-#include "chrome/browser/chromeos/input_method/xkeyboard.h"
-#include "chrome/browser/chromeos/language_preferences.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/notification_types.h"
-#include "googleurl/src/gurl.h"
-#include "ui/base/accelerators/accelerator.h"
-#include "unicode/uloc.h"
-
-#if !defined(USE_VIRTUAL_KEYBOARD)
-#include "chrome/browser/chromeos/input_method/candidate_window.h"
-#endif
-
-using content::BrowserThread;
-
-namespace {
-
-const char kIBusDaemonPath[] = "/usr/bin/ibus-daemon";
-
-// Finds a property which has |new_prop.key| from |prop_list|, and replaces the
-// property with |new_prop|. Returns true if such a property is found.
-bool FindAndUpdateProperty(
-    const chromeos::input_method::InputMethodProperty& new_prop,
-    chromeos::input_method::InputMethodPropertyList* prop_list) {
-  for (size_t i = 0; i < prop_list->size(); ++i) {
-    chromeos::input_method::InputMethodProperty& prop = prop_list->at(i);
-    if (prop.key == new_prop.key) {
-      const int saved_id = prop.selection_item_id;
-      // Update the list except the radio id. As written in
-      // chromeos_input_method.h, |prop.selection_item_id| is dummy.
-      prop = new_prop;
-      prop.selection_item_id = saved_id;
-      return true;
-    }
-  }
-  return false;
-}
-
-}  // namespace
+#include "chrome/browser/chromeos/input_method/input_method_manager_impl.h"
 
 namespace chromeos {
 namespace input_method {
 
-// The implementation of InputMethodManager.
-class InputMethodManagerImpl : public InputMethodManager,
-                               public content::NotificationObserver,
-#if !defined(USE_VIRTUAL_KEYBOARD)
-                               public CandidateWindowController::Observer,
-#endif
-                               public IBusController::Observer {
- public:
-  InputMethodManagerImpl()
-      : ibus_controller_(IBusController::Create()),
-        should_hide_properties_(true),
-        should_launch_ime_(false),
-        ime_connected_(false),
-        enable_auto_ime_shutdown_(false),  // workaround for crosbug.com/27051.
-        enable_extension_imes_(true),
-        shutting_down_(false),
-        ibus_daemon_process_handle_(base::kNullProcessHandle),
-        util_(whitelist_.GetSupportedInputMethods()),
-        xkeyboard_(XKeyboard::Create(util_)),
-        ALLOW_THIS_IN_INITIALIZER_LIST(
-            browser_state_monitor_(new BrowserStateMonitor(this))),
-        ignore_hotkeys_(false) {
-    // Observe APP_TERMINATING to stop input method daemon gracefully.
-    // We should not use APP_EXITING here since logout might be canceled by
-    // JavaScript after APP_EXITING is sent (crosbug.com/11055).
-    // Note that even if we fail to stop input method daemon from
-    // Chrome in case of a sudden crash, we have a way to do it from an
-    // upstart script. See crosbug.com/6515 and crosbug.com/6995 for
-    // details.
-    notification_registrar_.Add(this, content::NOTIFICATION_APP_TERMINATING,
-                                content::NotificationService::AllSources());
+namespace {
+InputMethodManager* g_input_method_manager = NULL;
+}  // namespace
 
-    // The observer should be added before Connect() so we can capture the
-    // initial connection change.
-    ibus_controller_->AddObserver(this);
-    ibus_controller_->Connect();
+// static
+void InputMethodManager::Initialize() {
+  DCHECK(!g_input_method_manager);
+  InputMethodManagerImpl* impl = new InputMethodManagerImpl;
+  impl->Init();
+  g_input_method_manager = impl;
+  VLOG(1) << "InputMethodManager initialized";
+}
 
-    EnableHotkeys();
-  }
+// static
+void InputMethodManager::InitializeForTesting(
+    InputMethodManager* mock_manager) {
+  DCHECK(!g_input_method_manager);
+  g_input_method_manager = mock_manager;
+  VLOG(1) << "InputMethodManager for testing initialized";
+}
 
-  virtual ~InputMethodManagerImpl() {
-    ibus_controller_->RemoveObserver(this);
-#if !defined(USE_VIRTUAL_KEYBOARD)
-    if (candidate_window_controller_.get())
-      candidate_window_controller_->RemoveObserver(this);
-#endif
-  }
-
-  virtual void AddObserver(InputMethodManager::Observer* observer) {
-    observers_.AddObserver(observer);
-  }
-
-  virtual void RemoveObserver(InputMethodManager::Observer* observer) {
-    observers_.RemoveObserver(observer);
-  }
-
-  virtual void AddCandidateWindowObserver(
-      InputMethodManager::CandidateWindowObserver* observer) {
-    candidate_window_observers_.AddObserver(observer);
-  }
-
-  virtual void RemoveCandidateWindowObserver(
-      InputMethodManager::CandidateWindowObserver* observer) {
-    candidate_window_observers_.RemoveObserver(observer);
-  }
-
-  virtual void AddVirtualKeyboardObserver(VirtualKeyboardObserver* observer) {
-    virtual_keyboard_observers_.AddObserver(observer);
-  }
-
-  virtual void RemoveVirtualKeyboardObserver(
-      VirtualKeyboardObserver* observer) {
-    virtual_keyboard_observers_.RemoveObserver(observer);
-  }
-
-  virtual InputMethodDescriptors* GetActiveInputMethods() {
-    InputMethodDescriptors* result = new InputMethodDescriptors;
-    // Build the active input method descriptors from the active input
-    // methods cache |active_input_method_ids_|.
-    for (size_t i = 0; i < active_input_method_ids_.size(); ++i) {
-      const std::string& input_method_id = active_input_method_ids_[i];
-      const InputMethodDescriptor* descriptor =
-          util_.GetInputMethodDescriptorFromId(input_method_id);
-      if (descriptor) {
-        result->push_back(*descriptor);
-      } else {
-        std::map<std::string, InputMethodDescriptor>::
-            const_iterator ix = extra_input_method_ids_.find(input_method_id);
-        if (ix != extra_input_method_ids_.end()) {
-          result->push_back(ix->second);
-        } else {
-          LOG(ERROR) << "Descriptor is not found for: " << input_method_id;
-        }
-      }
-    }
-    // Initially active_input_method_ids_ is empty. In this case, just
-    // returns the fallback input method descriptor.
-    if (result->empty()) {
-      // Since browser_tests call neither
-      // SetInputMethodConfig("preload_engines") nor EnableInputMethod(), this
-      // path might be taken.
-      result->push_back(
-          InputMethodDescriptor::GetFallbackInputMethodDescriptor());
-    }
-    return result;
-  }
-
-  virtual size_t GetNumActiveInputMethods() {
-    scoped_ptr<InputMethodDescriptors> input_methods(GetActiveInputMethods());
-    return input_methods->size();
-  }
-
-  virtual InputMethodDescriptors* GetSupportedInputMethods() {
-    return whitelist_.GetSupportedInputMethods();
-  }
-
-  virtual void ChangeInputMethod(const std::string& input_method_id) {
-    // Changing the input method isn't guaranteed to succeed here, but we
-    // should remember the last one regardless. See comments in
-    // FlushImeConfig() for details.
-    tentative_current_input_method_id_ = input_method_id;
-
-    if (InputMethodUtil::IsKeyboardLayout(input_method_id)) {
-      // We shouldn't use SetCurrentKeyboardLayoutByName() here. See
-      // comments at ChangeCurrentInputMethod() for details.
-      ChangeCurrentInputMethodFromId(input_method_id);
-      OnRegisterImeProperties(InputMethodPropertyList());  // notify the button.
-    } else {
-      // Otherwise, start the input method daemon, and change the input
-      // method via the daemon.
-      StartInputMethodDaemon();
-      // ChangeInputMethodViaIBus() fails if the IBus daemon is not
-      // ready yet. In this case, we'll defer the input method change
-      // until the daemon is ready.
-      if (!ChangeInputMethodViaIBus(input_method_id)) {
-        VLOG(1) << "Failed to change the input method to " << input_method_id
-                << " (deferring)";
-      }
-    }
-  }
-
-  virtual void EnableLayouts(const std::string& language_code,
-                             const std::string& initial_input_method_id) {
-    std::vector<std::string> candidates;
-    // Add input methods associated with the language.
-    util_.GetInputMethodIdsFromLanguageCode(language_code,
-                                            kKeyboardLayoutsOnly,
-                                            &candidates);
-    // Add the hardware keyboard as well. We should always add this so users
-    // can use the hardware keyboard on the login screen and the screen locker.
-    candidates.push_back(util_.GetHardwareInputMethodId());
-
-    std::vector<std::string> input_method_ids;
-    // First, add the initial input method ID, if it's requested, to
-    // input_method_ids, so it appears first on the list of active input
-    // methods at the input language status menu.
-    if (!initial_input_method_id.empty()) {
-      input_method_ids.push_back(initial_input_method_id);
-    }
-
-    // Add candidates to input_method_ids, while skipping duplicates.
-    for (size_t i = 0; i < candidates.size(); ++i) {
-      const std::string& candidate = candidates[i];
-      // Not efficient, but should be fine, as the two vectors are very
-      // short (2-5 items).
-      if (std::count(input_method_ids.begin(), input_method_ids.end(),
-                     candidate) == 0) {
-        input_method_ids.push_back(candidate);
-      }
-    }
-
-    // Update ibus-daemon setting. Here, we don't save the input method list
-    // in the user's preferences.
-    InputMethodConfigValue value;
-    value.type = InputMethodConfigValue::kValueTypeStringList;
-    value.string_list_value = input_method_ids;
-    SetInputMethodConfig(language_prefs::kGeneralSectionName,
-                         language_prefs::kPreloadEnginesConfigName,
-                         value);
-
-    // Finaly, change to the initial input method, as needed.
-    if (!initial_input_method_id.empty()) {
-      ChangeInputMethod(initial_input_method_id);
-    }
-  }
-
-  virtual void SetImePropertyActivated(const std::string& key,
-                                       bool activated) {
-    DCHECK(!key.empty());
-    ibus_controller_->SetImePropertyActivated(key, activated);
-  }
-
-  virtual bool InputMethodIsActivated(const std::string& input_method_id) {
-    scoped_ptr<InputMethodDescriptors> active_input_method_descriptors(
-        GetActiveInputMethods());
-    for (size_t i = 0; i < active_input_method_descriptors->size(); ++i) {
-      if (active_input_method_descriptors->at(i).id() == input_method_id) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  virtual bool SetInputMethodConfig(const std::string& section,
-                                    const std::string& config_name,
-                                    const InputMethodConfigValue& value) {
-    // If the config change is for preload engines, update the active
-    // input methods cache |active_input_method_ids_| here. We need to
-    // update the cache before actually flushing the config. since we need
-    // to return active input methods from GetActiveInputMethods() before
-    // the input method daemon starts. For instance, we need to show the
-    // list of available input methods (keyboard layouts) on the login
-    // screen before the input method starts.
-    if (section == language_prefs::kGeneralSectionName &&
-        config_name == language_prefs::kPreloadEnginesConfigName &&
-        value.type == InputMethodConfigValue::kValueTypeStringList) {
-      active_input_method_ids_ = value.string_list_value;
-
-      if (enable_extension_imes_) {
-        std::map<std::string, InputMethodDescriptor>::const_iterator ix;
-        for (ix = extra_input_method_ids_.begin();
-             ix != extra_input_method_ids_.end(); ++ix) {
-          active_input_method_ids_.push_back(ix->first);
-        }
-      }
-    }
-
-    // Before calling FlushImeConfig(), start input method process if necessary.
-    MaybeStartInputMethodDaemon(section, config_name, value);
-
-    const ConfigKeyType key = std::make_pair(section, config_name);
-    current_config_values_[key] = value;
-    if (ime_connected_) {
-      pending_config_requests_[key] = value;
-      FlushImeConfig();
-    }
-
-    if (section == language_prefs::kGeneralSectionName &&
-        config_name == language_prefs::kPreloadEnginesConfigName) {
-      // Stop input method process if necessary.
-      MaybeStopInputMethodDaemon();
-    }
-    // Change the current keyboard layout if necessary.
-    MaybeChangeCurrentKeyboardLayout(section, config_name, value);
-    return pending_config_requests_.empty();
-  }
-
-  // TODO(yusukes): Support input method specific hotkeys.
-  virtual void AddActiveIme(const std::string& id,
-                            const std::string& name,
-                            const std::vector<std::string>& layouts,
-                            const std::string& language) {
-    std::string virtual_layouts = JoinString(layouts, ',');
-
-    extra_input_method_ids_[id] = ibus_controller_->CreateInputMethodDescriptor(
-        id, name, virtual_layouts, language);
-    active_input_method_ids_.push_back(id);
-
-    // Ensure that the input method daemon is running.
-    StartInputMethodDaemon();
-  }
-
-  virtual void RemoveActiveIme(const std::string& id) {
-    std::vector<std::string>::iterator ix =
-        std::find(active_input_method_ids_.begin(),
-                  active_input_method_ids_.end(),
-                  id);
-    if (ix != active_input_method_ids_.end()) {
-      active_input_method_ids_.erase(ix);
-      // TODO(yusukes): this is a workaround for crosbug.com/27051. Uncomment
-      // this when the bug is fixed.
-      if (!active_input_method_ids_.empty()) {
-        ChangeInputMethod(active_input_method_ids_[0]);
-      }
-    }
-    extra_input_method_ids_.erase(id);
-
-    // Stop the IME daemon if needed.
-    MaybeStopInputMethodDaemon();
-  }
-
-  virtual bool GetExtraDescriptor(const std::string& id,
-                                  InputMethodDescriptor* descriptor) {
-    std::map<std::string, InputMethodDescriptor>::const_iterator ix =
-        extra_input_method_ids_.find(id);
-    if (ix != extra_input_method_ids_.end()) {
-      *descriptor = ix->second;
-      return true;
-    } else {
-      return false;
-    }
-  }
-
-  virtual InputMethodDescriptor GetPreviousInputMethod() const {
-    if (previous_input_method_.id().empty()) {
-      return InputMethodDescriptor::GetFallbackInputMethodDescriptor();
-    }
-    return previous_input_method_;
-  }
-
-  virtual InputMethodDescriptor GetCurrentInputMethod() const {
-    if (current_input_method_.id().empty()) {
-      return InputMethodDescriptor::GetFallbackInputMethodDescriptor();
-    }
-    return current_input_method_;
-  }
-
-  virtual InputMethodPropertyList GetCurrentInputMethodProperties() const {
-    if (should_hide_properties_ ||
-        InputMethodUtil::IsKeyboardLayout(GetCurrentInputMethod().id())) {
-      return InputMethodPropertyList();
-    }
-    return current_ime_properties_;
-  }
-
-  virtual void SendHandwritingStroke(const HandwritingStroke& stroke) {
-    ibus_controller_->SendHandwritingStroke(stroke);
-  }
-
-  virtual void CancelHandwritingStrokes(int stroke_count) {
-    // TODO(yusukes): Rename the function to CancelHandwritingStrokes.
-    ibus_controller_->CancelHandwriting(stroke_count);
-  }
-
-  virtual void RegisterVirtualKeyboard(const GURL& launch_url,
-                                       const std::string& name,
-                                       const std::set<std::string>& layouts,
-                                       bool is_system) {
-    virtual_keyboard_selector_.AddVirtualKeyboard(launch_url,
-                                                  name,
-                                                  layouts,
-                                                  is_system);
-  }
-
-  virtual const std::map<GURL, const VirtualKeyboard*>&
-  GetUrlToKeyboardMapping() const {
-    return virtual_keyboard_selector_.url_to_keyboard();
-  }
-
-  virtual const std::multimap<std::string, const VirtualKeyboard*>&
-  GetLayoutNameToKeyboardMapping() const {
-    return virtual_keyboard_selector_.layout_to_keyboard();
-  }
-
-  virtual bool SetVirtualKeyboardPreference(const std::string& input_method_id,
-                                            const GURL& extention_url) {
-    const bool result = virtual_keyboard_selector_.SetUserPreference(
-        input_method_id, extention_url);
-    UpdateVirtualKeyboardUI();
-    return result;
-  }
-
-  virtual void ClearAllVirtualKeyboardPreferences() {
-    virtual_keyboard_selector_.ClearAllUserPreferences();
-    UpdateVirtualKeyboardUI();
-  }
-
-  virtual InputMethodUtil* GetInputMethodUtil() {
-    return &util_;
-  }
-
-  virtual XKeyboard* GetXKeyboard() {
-    return xkeyboard_.get();
-  }
-
-  virtual void CandidateWindowOpened() {
-    FOR_EACH_OBSERVER(InputMethodManager::CandidateWindowObserver,
-                      candidate_window_observers_,
-                      CandidateWindowOpened(this));
-  }
-
-  virtual void CandidateWindowClosed() {
-    FOR_EACH_OBSERVER(InputMethodManager::CandidateWindowObserver,
-                      candidate_window_observers_,
-                      CandidateWindowClosed(this));
-  }
-
-  virtual bool SwitchToNextInputMethod() {
-    if (ignore_hotkeys_) {
-      return false;
-    }
-
-    // Sanity checks.
-    if (active_input_method_ids_.empty()) {
-      LOG(ERROR) << "active input method is empty";
-      return false;
-    }
-    if (current_input_method_.id().empty()) {
-      LOG(ERROR) << "current_input_method_ is unknown";
-      return false;
-    }
-
-    // Find the next input method.
-    std::vector<std::string>::const_iterator iter =
-        std::find(active_input_method_ids_.begin(),
-                  active_input_method_ids_.end(),
-                  current_input_method_.id());
-    if (iter != active_input_method_ids_.end()) {
-      ++iter;
-    }
-    if (iter == active_input_method_ids_.end()) {
-      iter = active_input_method_ids_.begin();
-    }
-    ChangeInputMethod(*iter);
-    return true;
-  }
-
-  virtual bool SwitchToPreviousInputMethod() {
-    if (ignore_hotkeys_) {
-      return false;
-    }
-
-    // Sanity check.
-    if (active_input_method_ids_.empty()) {
-      LOG(ERROR) << "active input method is empty";
-      return false;
-    }
-
-    if (previous_input_method_.id().empty() ||
-        previous_input_method_.id() == current_input_method_.id()) {
-      return SwitchToNextInputMethod();
-    }
-
-    std::vector<std::string>::const_iterator iter =
-        std::find(active_input_method_ids_.begin(),
-                  active_input_method_ids_.end(),
-                  previous_input_method_.id());
-    if (iter == active_input_method_ids_.end()) {
-      // previous_input_method_ is not supported.
-      return SwitchToNextInputMethod();
-    }
-    ChangeInputMethod(*iter);
-    return true;
-  }
-
-  virtual bool SwitchInputMethod(const ui::Accelerator& accelerator) {
-    if (ignore_hotkeys_) {
-      return false;
-    }
-
-    // Sanity check.
-    if (active_input_method_ids_.empty()) {
-      LOG(ERROR) << "active input method is empty";
-      return false;
-    }
-
-    // Get the list of input method ids for the |accelerator|. For example, get
-    // { "mozc-hangul", "xkb:kr:kr104:kor" } for ui::VKEY_DBE_SBCSCHAR.
-    std::vector<std::string> input_method_ids_to_switch;
-    switch (accelerator.key_code()) {
-      case ui::VKEY_CONVERT:  // Henkan key on JP106 keyboard
-        input_method_ids_to_switch.push_back("mozc-jp");
-        break;
-      case ui::VKEY_NONCONVERT:  // Muhenkan key on JP106 keyboard
-        input_method_ids_to_switch.push_back("xkb:jp::jpn");
-        break;
-      case ui::VKEY_DBE_SBCSCHAR:  // ZenkakuHankaku key on JP106 keyboard
-      case ui::VKEY_DBE_DBCSCHAR:
-        input_method_ids_to_switch.push_back("mozc-jp");
-        input_method_ids_to_switch.push_back("xkb:jp::jpn");
-        break;
-      case ui::VKEY_HANGUL:  // Hangul (or right Alt) key on Korean keyboard
-      case ui::VKEY_SPACE:  // Shift+Space
-        input_method_ids_to_switch.push_back("mozc-hangul");
-        input_method_ids_to_switch.push_back("xkb:kr:kr104:kor");
-        break;
-      default:
-        NOTREACHED();
-        break;
-    }
-    if (input_method_ids_to_switch.empty()) {
-      LOG(ERROR) << "Unexpected VKEY: " << accelerator.key_code();
-      return false;
-    }
-
-    // Obtain the intersection of input_method_ids_to_switch and
-    // active_input_method_ids_. The order of IDs in active_input_method_ids_ is
-    // preserved.
-    std::vector<std::string> ids;
-    for (size_t i = 0; i < input_method_ids_to_switch.size(); ++i) {
-      const std::string& id = input_method_ids_to_switch[i];
-      if (std::find(active_input_method_ids_.begin(),
-                    active_input_method_ids_.end(),
-                    id) != active_input_method_ids_.end()) {
-        ids.push_back(id);
-      }
-    }
-    if (ids.empty()) {
-      // No input method for the accelerator is active. For example, we should
-      // just ignore VKEY_HANGUL when mozc-hangul is not active.
-      return false;
-    }
-
-    // If |current_input_method_| is not in ids, switch to ids[0]. If
-    // |current_input_method_| is ids[N], switch to ids[N+1].
-    std::vector<std::string>::const_iterator iter =
-        std::find(ids.begin(), ids.end(), current_input_method_.id());
-    if (iter != ids.end()) {
-      ++iter;
-    }
-    if (iter == ids.end()) {
-      iter = ids.begin();
-    }
-    ChangeInputMethod(*iter);
-    return true;  // consume the accelerator.
-  }
-
-  virtual void EnableHotkeys() {
-    ignore_hotkeys_ = false;
-  }
-
-  virtual void DisableHotkeys() {
-    ignore_hotkeys_ = true;
-  }
-
-  static InputMethodManagerImpl* GetInstance() {
-    return Singleton<InputMethodManagerImpl,
-        DefaultSingletonTraits<InputMethodManagerImpl> >::get();
-  }
-
- private:
-  friend struct DefaultSingletonTraits<InputMethodManagerImpl>;
-
-  // Returns true if the given input method config value is a string list
-  // that only contains an input method ID of a keyboard layout.
-  bool ContainOnlyKeyboardLayout(const std::vector<std::string>& value) {
-    for (size_t i = 0; i < value.size(); ++i) {
-      if (!InputMethodUtil::IsKeyboardLayout(value[i])) {
-        return false;
-      }
-    }
-    return true;
-  }
-
-  // Starts input method daemon based on the input method configuration being
-  // updated. |section| is a section name of the input method configuration
-  // (e.g. "general", "general/hotkey"). |config_name| is a name of the
-  // configuration (e.g. "preload_engines", "previous_engine"). |value| is the
-  // configuration value to be set.
-  void MaybeStartInputMethodDaemon(const std::string& section,
-                                   const std::string& config_name,
-                                   const InputMethodConfigValue& value) {
-    if (section == language_prefs::kGeneralSectionName &&
-        config_name == language_prefs::kPreloadEnginesConfigName &&
-        value.type == InputMethodConfigValue::kValueTypeStringList &&
-        !value.string_list_value.empty()) {
-      // If there is only one input method which is a keyboard layout,
-      // we don't start the input method processes.
-      if (ContainOnlyKeyboardLayout(value.string_list_value)) {
-        // Do not start the input method daemon.
-        return;
-      }
-
-      // Otherwise, start the input method daemon.
-      const bool just_started = StartInputMethodDaemon();
-      if (!just_started) {
-        // The daemon is already running.
-        // Do not |update tentative_current_input_method_id_|.
-        return;
-      }
-
-      // The daemon has just been started. To select the initial input method
-      // engine correctly, update |tentative_current_input_method_id_|.
-      if (tentative_current_input_method_id_.empty()) {
-        // Since the |current_input_method_| is in the preloaded engine list,
-        // switch to the engine. This is necessary ex. for the following case:
-        // 1. "xkb:jp::jpn" is enabled. ibus-daemon is not running.
-        // 2. A user enabled "mozc" via DOMUI as well. ibus-daemon is started
-        //    and the preloaded engine list is set to "mozc,xkb:jp::jpn".
-        // 3. ibus-daemon selects "mozc" as its current engine since "mozc" is
-        //    on top of the preloaded engine list.
-        // 4. Therefore, we have to change the current engine to "xkb:jp::jpn"
-        //    explicitly to avoid unexpected engine switch.
-        tentative_current_input_method_id_ = current_input_method_.id();
-      }
-
-      if (std::find(value.string_list_value.begin(),
-                    value.string_list_value.end(),
-                    tentative_current_input_method_id_)
-          == value.string_list_value.end()) {
-        // The |current_input_method_| is NOT in the preloaded engine list.
-        // In this case, ibus-daemon will automatically select the first engine
-        // in the list, |value.string_list_value[0]|, and send global engine
-        // changed signal to Chrome. See crosbug.com/13406.
-        tentative_current_input_method_id_.clear();
-      }
-    }
-  }
-
-  // Stops input method daemon based on the |enable_auto_ime_shutdown_| flag
-  // and input method configuration being updated.
-  // See also: MaybeStartInputMethodDaemon().
-  void MaybeStopInputMethodDaemon() {
-    // If there is only one input method which is a keyboard layout,
-    // and |enable_auto_ime_shutdown_| is true, we'll stop the input
-    // method daemon.
-    if (ContainOnlyKeyboardLayout(active_input_method_ids_) &&
-        enable_auto_ime_shutdown_) {
-      if (StopInputMethodDaemon()) {
-        // The process is killed. Change the current keyboard layout.
-        // We shouldn't use SetCurrentKeyboardLayoutByName() here. See
-        // comments at ChangeCurrentInputMethod() for details.
-        ChangeCurrentInputMethodFromId(active_input_method_ids_[0]);
-      }
-    }
-  }
-
-  // Change the keyboard layout per input method configuration being
-  // updated, if necessary. See also: MaybeStartInputMethodDaemon().
-  void MaybeChangeCurrentKeyboardLayout(const std::string& section,
-                                        const std::string& config_name,
-                                        const InputMethodConfigValue& value) {
-    if (section == language_prefs::kGeneralSectionName &&
-        config_name == language_prefs::kPreloadEnginesConfigName) {
-      if (value.string_list_value.size() == 1 ||
-          (value.string_list_value.size() != 0 &&
-           std::find(value.string_list_value.begin(),
-                     value.string_list_value.end(),
-                     current_input_method_.id()) ==
-           value.string_list_value.end())) {
-        // This is necessary to initialize current_input_method_. This is also
-        // necessary when the current layout (e.g. INTL) out of two or more
-        // active ones (e.g. US, DV, and INTL) is disabled.
-        ChangeCurrentInputMethodFromId(value.string_list_value[0]);
-      }
-      DCHECK(!current_input_method_.id().empty());
-
-      // Update the indicator.
-      // TODO(yusukes): Remove ActiveInputMethodsChanged notification in
-      // FlushImeConfig().
-      const size_t num_active_input_methods = GetNumActiveInputMethods();
-      FOR_EACH_OBSERVER(InputMethodManager::Observer, observers_,
-                        ActiveInputMethodsChanged(this,
-                                                  GetCurrentInputMethod(),
-                                                  num_active_input_methods));
-    }
-  }
-
-  // Changes the current input method to |input_method_id| via IBus
-  // daemon. If the id is not in the preload_engine list, this function
-  // changes the current method to the first preloaded engine. Returns
-  // true if the current engine is switched to |input_method_id| or the
-  // first one.
-  bool ChangeInputMethodViaIBus(const std::string& input_method_id) {
-    std::string input_method_id_to_switch = input_method_id;
-
-    if (!InputMethodIsActivated(input_method_id)) {
-      // This path might be taken if prefs::kLanguageCurrentInputMethod (NOT
-      // synced with cloud) and kLanguagePreloadEngines (synced with cloud) are
-      // mismatched. e.g. the former is 'xkb:us::eng' and the latter (on the
-      // sync server) is 'xkb:jp::jpn,mozc'.
-      scoped_ptr<InputMethodDescriptors> input_methods(GetActiveInputMethods());
-      DCHECK(!input_methods->empty());
-      if (!input_methods->empty()) {
-        input_method_id_to_switch = input_methods->at(0).id();
-        LOG(INFO) << "Can't change the current input method to "
-                  << input_method_id << " since the engine is not preloaded. "
-                  << "Switch to " << input_method_id_to_switch << " instead.";
-      }
-    }
-
-    if (ibus_controller_->ChangeInputMethod(input_method_id_to_switch)) {
-      return true;
-    }
-
-    // ChangeInputMethod() fails if the IBus daemon is not yet ready.
-    LOG(ERROR) << "Can't switch input method to " << input_method_id_to_switch;
-    return false;
-  }
-
-  // Flushes the input method config data. The config data is queued up in
-  // |pending_config_requests_| until the config backend (ibus-memconf)
-  // starts.
-  void FlushImeConfig() {
-    bool active_input_methods_are_changed = false;
-    InputMethodConfigRequests::iterator iter = pending_config_requests_.begin();
-    while (iter != pending_config_requests_.end()) {
-      const std::string& section = iter->first.first;
-      const std::string& config_name = iter->first.second;
-      InputMethodConfigValue& value = iter->second;
-
-      if (config_name == language_prefs::kPreloadEnginesConfigName &&
-          !tentative_current_input_method_id_.empty()) {
-        // We should use |tentative_current_input_method_id_| as the initial
-        // active input method for the following reasons:
-        //
-        // 1) Calls to ChangeInputMethod() will fail if the input method has not
-        // yet been added to preload_engines.  As such, the call is deferred
-        // until after all config values have been sent to the IME process.
-        //
-        // 2) We might have already changed the current input method to one
-        // of XKB layouts without going through the IBus daemon (we can do
-        // it without the IBus daemon started).
-        std::vector<std::string>::iterator engine_iter = std::find(
-            value.string_list_value.begin(),
-            value.string_list_value.end(),
-            tentative_current_input_method_id_);
-        if (engine_iter != value.string_list_value.end()) {
-          // Use std::rotate to keep the relative order of engines the same e.g.
-          // from "A,B,C" to "C,A,B".
-          // We don't have to |active_input_method_ids_|, which decides the
-          // order of engines in the switcher menu, since the relative order
-          // of |value.string_list_value| is not changed.
-          std::rotate(value.string_list_value.begin(),
-                      engine_iter,  // this becomes the new first element
-                      value.string_list_value.end());
-        } else {
-          LOG(WARNING) << tentative_current_input_method_id_
-                       << " is not in preload_engines: " << value.ToString();
-        }
-        tentative_current_input_method_id_.erase();
-      }
-
-      if (ibus_controller_->SetInputMethodConfig(section, config_name, value)) {
-        // Check if it's a change in active input methods.
-        if (config_name == language_prefs::kPreloadEnginesConfigName) {
-          active_input_methods_are_changed = true;
-          VLOG(1) << "Updated preload_engines: " << value.ToString();
-        }
-        // Successfully sent. Remove the command and proceed to the next one.
-        pending_config_requests_.erase(iter++);
-      } else {
-        // If SetInputMethodConfig() fails, subsequent calls will likely fail.
-        break;
-      }
-    }
-
-    // Notify the current input method and the number of active input methods to
-    // the UI so that the UI could determine e.g. if it should show/hide the
-    // input method indicator, etc. We have to call FOR_EACH_OBSERVER here since
-    // updating "preload_engine" does not necessarily trigger a DBus signal such
-    // as "global-engine-changed". For example,
-    // 1) If we change the preload_engine from "xkb:us:intl:eng" (i.e. the
-    //    indicator is hidden) to "xkb:us:intl:eng,mozc", we have to update UI
-    //    so it shows the indicator, but no signal is sent from ibus-daemon
-    //    because the current input method is not changed.
-    // 2) If we change the preload_engine from "xkb:us::eng,mozc" (i.e. the
-    //    indicator is shown and ibus-daemon is started) to "xkb:us::eng", we
-    //    have to update UI so it hides the indicator, but we should not expect
-    //    that ibus-daemon could send a DBus signal since the daemon is killed
-    //    right after this FlushImeConfig() call.
-    if (active_input_methods_are_changed) {
-      // The |current_input_method_| member might be stale here as
-      // SetInputMethodConfig("preload_engine") call above might change the
-      // current input method in ibus-daemon (ex. this occurs when the
-      // input method currently in use is removed from the options
-      // page). However, it should be safe to use the member here,
-      // for the following reasons:
-      // 1. If ibus-daemon is to be killed, we'll switch to the only one
-      //    keyboard layout, and observers are notified. See
-      //    MaybeStopInputMethodDaemon() for details.
-      // 2. Otherwise, "global-engine-changed" signal is delivered from
-      //    ibus-daemon, and observers are notified. See
-      //    InputMethodChangedHandler() for details.
-      const size_t num_active_input_methods = GetNumActiveInputMethods();
-      FOR_EACH_OBSERVER(InputMethodManager::Observer, observers_,
-                        ActiveInputMethodsChanged(this,
-                                                  current_input_method_,
-                                                  num_active_input_methods));
-    }
-  }
-
-  // IBusController override.
-  virtual void OnCurrentInputMethodChanged(
-      const InputMethodDescriptor& current_input_method) {
-    // The handler is called when the input method method change is
-    // notified via a DBus connection. Since the DBus notificatiosn are
-    // handled in the UI thread, we can assume that this function always
-    // runs on the UI thread, but just in case.
-    if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-      LOG(ERROR) << "Not on UI thread";
-      return;
-    }
-
-    ChangeCurrentInputMethod(current_input_method);
-  }
-
-  // IBusController override.
-  virtual void OnRegisterImeProperties(
-      const InputMethodPropertyList& prop_list) {
-    // See comments in InputMethodChangedHandler.
-    if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-      LOG(ERROR) << "Not on UI thread";
-      return;
-    }
-
-    RegisterProperties(prop_list);
-  }
-
-  // IBusController override.
-  virtual void OnUpdateImeProperty(
-      const InputMethodPropertyList& prop_list) {
-    // See comments in InputMethodChangedHandler.
-    if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-      LOG(ERROR) << "Not on UI thread";
-      return;
-    }
-
-    UpdateProperty(prop_list);
-  }
-
-  // IBusController override.
-  virtual void OnConnectionChange(bool connected) {
-    // See comments in InputMethodChangedHandler.
-    if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-      LOG(ERROR) << "Not on UI thread";
-      return;
-    }
-
-    ime_connected_ = connected;
-    if (connected) {
-      pending_config_requests_.clear();
-      pending_config_requests_.insert(current_config_values_.begin(),
-                                      current_config_values_.end());
-      FlushImeConfig();
-    }
-  }
-
-  // Changes the current input method from the given input method
-  // descriptor.  This function updates states like current_input_method_
-  // and notifies observers about the change (that will update the
-  // preferences), hence this function should always be used even if you
-  // just need to change the current keyboard layout.
-  void ChangeCurrentInputMethod(const InputMethodDescriptor& new_input_method) {
-    if (current_input_method_.id() != new_input_method.id()) {
-      previous_input_method_ = current_input_method_;
-      current_input_method_ = new_input_method;
-
-      // Change the keyboard layout to a preferred layout for the input method.
-      if (!xkeyboard_->SetCurrentKeyboardLayoutByName(
-              current_input_method_.keyboard_layout())) {
-        LOG(ERROR) << "Failed to change keyboard layout to "
-                   << current_input_method_.keyboard_layout();
-      }
-    }
-
-    // Update input method indicators (e.g. "US", "DV") in Chrome windows.
-    // For now, we have to do this every time to keep indicators updated. See
-    // comments near the FOR_EACH_OBSERVER call in FlushImeConfig() for details.
-    const size_t num_active_input_methods = GetNumActiveInputMethods();
-    FOR_EACH_OBSERVER(InputMethodManager::Observer, observers_,
-                      InputMethodChanged(this,
-                                         current_input_method_,
-                                         num_active_input_methods));
-
-    UpdateVirtualKeyboardUI();
-  }
-
-  void UpdateVirtualKeyboardUI() {
-#if defined(USE_VIRTUAL_KEYBOARD)
-    const VirtualKeyboard* virtual_keyboard = NULL;
-    std::string virtual_keyboard_layout = "";
-
-    const std::vector<std::string>& layouts_vector =
-        current_input_method_.virtual_keyboard_layouts();
-    std::vector<std::string>::const_iterator iter;
-    for (iter = layouts_vector.begin(); iter != layouts_vector.end(); ++iter) {
-      virtual_keyboard =
-          virtual_keyboard_selector_.SelectVirtualKeyboard(*iter);
-      if (virtual_keyboard) {
-        virtual_keyboard_layout = *iter;
-        break;
-      }
-    }
-
-    if (!virtual_keyboard) {
-      // The system virtual keyboard does not support some XKB layouts? or
-      // a third-party input method engine uses a wrong virtual keyboard
-      // layout name? Fallback to the default layout.
-      LOG(ERROR) << "Could not find a virtual keyboard for "
-                 << current_input_method_.id();
-
-      // If the hardware is for US, show US Qwerty virtual keyboard.
-      // If it's for France, show Azerty one.
-      const std::string fallback_id = GetInputMethodUtil()->
-          GetHardwareInputMethodId();
-      const InputMethodDescriptor* fallback_desc =
-          GetInputMethodUtil()->GetInputMethodDescriptorFromId(fallback_id);
-
-      DCHECK(fallback_desc);
-      const std::vector<std::string>& fallback_layouts_vector =
-          fallback_desc->virtual_keyboard_layouts();
-
-      for (iter = fallback_layouts_vector.begin();
-           iter != fallback_layouts_vector.end();
-           ++iter) {
-        virtual_keyboard =
-            virtual_keyboard_selector_.SelectVirtualKeyboard(*iter);
-        if (virtual_keyboard) {
-          virtual_keyboard_layout = *iter;
-          LOG(ERROR) << "Fall back to '" << (*iter) << "' virtual keyboard";
-          break;
-        }
-      }
-    }
-
-    if (!virtual_keyboard) {
-      // kFallbackVirtualKeyboardLayout should always be supported by one of the
-      // system virtual keyboards.
-      static const char kFallbackVirtualKeyboardLayout[] = "us";
-
-      LOG(ERROR) << "Could not find a FALLBACK virtual keyboard for "
-                 << current_input_method_.id()
-                 << ". Use '" << kFallbackVirtualKeyboardLayout
-                 << "' virtual keyboard";
-      virtual_keyboard = virtual_keyboard_selector_.SelectVirtualKeyboard(
-          kFallbackVirtualKeyboardLayout);
-      virtual_keyboard_layout = kFallbackVirtualKeyboardLayout;
-    }
-
-    if (virtual_keyboard) {
-      FOR_EACH_OBSERVER(VirtualKeyboardObserver, virtual_keyboard_observers_,
-                        VirtualKeyboardChanged(this,
-                                               *virtual_keyboard,
-                                               virtual_keyboard_layout));
-    }
-#endif  // USE_VIRTUAL_KEYBOARD
-  }
-
-  // Changes the current input method from the given input method ID.
-  // This function is just a wrapper of ChangeCurrentInputMethod().
-  void ChangeCurrentInputMethodFromId(const std::string& input_method_id) {
-    const InputMethodDescriptor* descriptor =
-        util_.GetInputMethodDescriptorFromId(input_method_id);
-    if (descriptor) {
-      ChangeCurrentInputMethod(*descriptor);
-    } else {
-      LOG(ERROR) << "Descriptor is not found for: " << input_method_id;
-    }
-  }
-
-  // Registers the properties used by the current input method.
-  void RegisterProperties(const InputMethodPropertyList& prop_list) {
-    // |prop_list| might be empty. This means "hide properties."
-    if (prop_list.empty()) {
-      should_hide_properties_ = true;
-    } else {
-      should_hide_properties_ = false;
-      current_ime_properties_ = prop_list;
-    }
-    // Update input method menu
-    FOR_EACH_OBSERVER(InputMethodManager::Observer, observers_,
-                      PropertyListChanged(this,
-                                          GetCurrentInputMethodProperties()));
-  }
-
-  // Starts the input method daemon. Unlike MaybeStopInputMethodDaemon(),
-  // this function always starts the daemon. Returns true if the daemon is
-  // started. Otherwise, e.g. the daemon is already started, returns false.
-  bool StartInputMethodDaemon() {
-    should_launch_ime_ = true;
-    return MaybeLaunchInputMethodDaemon();
-  }
-
-  // Updates the properties used by the current input method.
-  void UpdateProperty(const InputMethodPropertyList& prop_list) {
-    for (size_t i = 0; i < prop_list.size(); ++i) {
-      FindAndUpdateProperty(prop_list[i], &current_ime_properties_);
-    }
-
-    // Update input method menu
-    FOR_EACH_OBSERVER(InputMethodManager::Observer, observers_,
-                      PropertyListChanged(this,
-                                          GetCurrentInputMethodProperties()));
-  }
-
-  // Launches an input method procsess specified by the given command
-  // line. On success, returns true and stores the process handle in
-  // |process_handle|. Otherwise, returns false, and the contents of
-  // |process_handle| is untouched. OnImeShutdown will be called when the
-  // process terminates.
-  bool LaunchInputMethodProcess(const std::string& command_line,
-                                base::ProcessHandle* process_handle) {
-    std::vector<std::string> argv;
-    base::ProcessHandle handle = base::kNullProcessHandle;
-
-    // TODO(zork): export "LD_PRELOAD=/usr/lib/libcrash.so"
-    base::SplitString(command_line, ' ', &argv);
-
-    if (!base::LaunchProcess(argv, base::LaunchOptions(), &handle)) {
-      LOG(ERROR) << "Could not launch: " << command_line;
-      return false;
-    }
-
-    // g_child_watch_add is necessary to prevent the process from becoming a
-    // zombie.
-    // TODO(yusukes): port g_child_watch_add to base/process_utils_posix.cc.
-    const base::ProcessId pid = base::GetProcId(handle);
-    g_child_watch_add(pid,
-                      reinterpret_cast<GChildWatchFunc>(OnImeShutdown),
-                      this);
-
-    *process_handle = handle;
-    VLOG(1) << command_line << " (PID=" << pid << ") is started";
-    return  true;
-  }
-
-  // Launches input method daemon if these are not yet running. Returns true if
-  // the daemon is started. Otherwise, e.g. the daemon is already started,
-  // returns false.
-  bool MaybeLaunchInputMethodDaemon() {
-    if (!should_launch_ime_) {
-      return false;
-    }
-
-    if (shutting_down_) {
-      NOTREACHED() << "Trying to launch input method while shutting down";
-      return false;
-    }
-
-#if !defined(USE_VIRTUAL_KEYBOARD)
-    if (!candidate_window_controller_.get()) {
-      candidate_window_controller_.reset(
-          CandidateWindowController::CreateCandidateWindowController());
-      if (candidate_window_controller_->Init()) {
-        candidate_window_controller_->AddObserver(this);
-      } else {
-        LOG(WARNING) << "Failed to initialize the candidate window controller";
-      }
-    }
-#endif
-
-    if (ibus_daemon_process_handle_ != base::kNullProcessHandle) {
-      return false;  // ibus-daemon is already running.
-    }
-
-    // TODO(zork): Send output to /var/log/ibus.log
-    const std::string ibus_daemon_command_line =
-        base::StringPrintf(
-            "%s --panel=disable --cache=none --restart --replace",
-            kIBusDaemonPath);
-    if (!LaunchInputMethodProcess(
-            ibus_daemon_command_line, &ibus_daemon_process_handle_)) {
-      LOG(ERROR) << "Failed to launch " << ibus_daemon_command_line;
-      return false;
-    }
-    return true;
-  }
-
-  // Called when the input method process is shut down.
-  static void OnImeShutdown(GPid pid,
-                            gint status,
-                            InputMethodManagerImpl* library) {
-    if (library->ibus_daemon_process_handle_ != base::kNullProcessHandle &&
-        base::GetProcId(library->ibus_daemon_process_handle_) == pid) {
-      library->ibus_daemon_process_handle_ = base::kNullProcessHandle;
-    }
-
-    // Restart input method daemon if needed.
-    library->MaybeLaunchInputMethodDaemon();
-  }
-
-  // Stops the backend input method daemon. This function should also be
-  // called from MaybeStopInputMethodDaemon(), except one case where we
-  // stop the input method daemon at Chrome shutdown in Observe(). Returns true
-  // if the daemon is stopped. Otherwise, e.g. the daemon is already stopped,
-  // returns false.
-  bool StopInputMethodDaemon() {
-    should_launch_ime_ = false;
-    if (ibus_daemon_process_handle_ != base::kNullProcessHandle) {
-      const base::ProcessId pid = base::GetProcId(ibus_daemon_process_handle_);
-      if (!ibus_controller_->StopInputMethodProcess()) {
-        LOG(ERROR) << "StopInputMethodProcess IPC failed. Sending SIGTERM to "
-                   << "PID " << pid;
-        base::KillProcess(ibus_daemon_process_handle_, -1, false /* wait */);
-      }
-      VLOG(1) << "ibus-daemon (PID=" << pid << ") is terminated";
-      ibus_daemon_process_handle_ = base::kNullProcessHandle;
-      return true;
-    }
-    return false;
-  }
-
-  void SetEnableAutoImeShutdown(bool enable) {
-    // TODO(yusukes): this is a workaround for crosbug.com/27051. Uncommen this
-    // when the bug is fixed.
-
-    // enable_auto_ime_shutdown_ = enable;
-  }
-
-  void SetEnableExtensionIMEs(bool enable) {
-    enable_extension_imes_ = enable;
-  }
-
-  // content::NotificationObserver implementation:
-  void Observe(int type,
-               const content::NotificationSource& source,
-               const content::NotificationDetails& details) {
-    // Stop the input method daemon on browser shutdown.
-    if (type == content::NOTIFICATION_APP_TERMINATING) {
-      shutting_down_ = true;
-      notification_registrar_.RemoveAll();
-      StopInputMethodDaemon();
-#if !defined(USE_VIRTUAL_KEYBOARD)
-      if (candidate_window_controller_.get())
-        candidate_window_controller_->RemoveObserver(this);
-      candidate_window_controller_.reset(NULL);
-#endif
-      // |browser_state_monitor_| has to be destructed while the PrefService
-      // object associated with the monitor is alive. (crbug.com/120183)
-      browser_state_monitor_.reset();
-    }
-  }
-
-  // The IBus controller is used to control the input method status and
-  // allow allow callbacks when the input method status changes.
-  scoped_ptr<IBusController> ibus_controller_;
-  ObserverList<InputMethodManager::Observer> observers_;
-  ObserverList<InputMethodManager::CandidateWindowObserver>
-      candidate_window_observers_;
-  ObserverList<VirtualKeyboardObserver> virtual_keyboard_observers_;
-
-  // The input method which was/is selected.
-  InputMethodDescriptor previous_input_method_;
-  InputMethodDescriptor current_input_method_;
-
-  // The input method properties which the current input method uses. The list
-  // might be empty when no input method is used.
-  InputMethodPropertyList current_ime_properties_;
-  bool should_hide_properties_;
-
-  typedef std::pair<std::string, std::string> ConfigKeyType;
-  typedef std::map<
-    ConfigKeyType, InputMethodConfigValue> InputMethodConfigRequests;
-  // SetInputMethodConfig requests that are not yet completed.
-  // Use a map to queue config requests, so we only send the last request for
-  // the same config key (i.e. we'll discard ealier requests for the same
-  // config key). As we discard old requests for the same config key, the order
-  // of requests doesn't matter, so it's safe to use a map.
-  InputMethodConfigRequests pending_config_requests_;
-
-  // Values that have been set via SetInputMethodConfig().  We keep a copy
-  // available to resend if the ime restarts and loses its state.
-  InputMethodConfigRequests current_config_values_;
-
-  // This is used to register this object to APP_TERMINATING notification.
-  content::NotificationRegistrar notification_registrar_;
-
-  // True if we should launch the input method daemon.
-  bool should_launch_ime_;
-  // True if the connection to the IBus daemon is alive.
-  bool ime_connected_;
-  // True if we should stop input method daemon when there are no input
-  // methods other than one for the hardware keyboard.
-  bool enable_auto_ime_shutdown_;
-  // True if extension IMEs can be enabled.
-  bool enable_extension_imes_;
-  // The ID of the tentative current input method (ex. "mozc"). This value
-  // can be different from the actual current input method, if
-  // ChangeInputMethod() fails.
-  // TODO(yusukes): clear this variable when a user logs in.
-  std::string tentative_current_input_method_id_;
-
-  // The candidate window.  This will be deleted when the APP_TERMINATING
-  // message is sent.
-#if !defined(USE_VIRTUAL_KEYBOARD)
-  scoped_ptr<CandidateWindowController> candidate_window_controller_;
-#endif
-
-  // True if we've received the APP_TERMINATING notification.
-  bool shutting_down_;
-
-  // The process handle of the IBus daemon. kNullProcessHandle if it's not
-  // running.
-  base::ProcessHandle ibus_daemon_process_handle_;
-
-  // An object which keeps a list of available virtual keyboards.
-  VirtualKeyboardSelector virtual_keyboard_selector_;
-
-  // The active input method ids cache.
-  std::vector<std::string> active_input_method_ids_;
-
-  // Extra input methods that have been explicitly added to the menu, such as
-  // those created by extension.
-  std::map<std::string, InputMethodDescriptor> extra_input_method_ids_;
-
-  InputMethodWhitelist whitelist_;
-
-  // An object which provides miscellaneous input method utility functions. Note
-  // that |util_| is required to initialize |xkeyboard_|.
-  InputMethodUtil util_;
-
-  // An object for switching XKB layouts and keyboard status like caps lock and
-  // auto-repeat interval.
-  scoped_ptr<XKeyboard> xkeyboard_;
-
-  // An object which monitors a notification from the browser to keep track of
-  // the browser state (not logged in, logged in, etc.).
-  scoped_ptr<BrowserStateMonitor> browser_state_monitor_;
-
-  // true when DisableHotkeys() is called to temporarily disable IME hotkeys.
-  // EnableHotkeys() resets the flag to the default value, false.
-  bool ignore_hotkeys_;
-
-  DISALLOW_COPY_AND_ASSIGN(InputMethodManagerImpl);
-};
+// static
+void InputMethodManager::Shutdown() {
+  // TODO(yusukes): The NULL check is needed for some unit_tests such as
+  // 'WarmConnectionFieldTrial_WarmestSocket' which seem to destruct a
+  // ChromeBrowserMainPartsChromeos instance without calling
+  // ChromeBrowserMainPartsChromeos::PostMainMessageLoopStart(). It's probably
+  // better to fix the tests and remove the hack here.
+  if (!g_input_method_manager)
+    LOG(WARNING) << "InputMethodManager:Shutdown() called with NULL manager";
+  else
+    delete g_input_method_manager;
+  g_input_method_manager = NULL;
+  VLOG(1) << "InputMethodManager shutdown";
+}
 
 // static
 InputMethodManager* InputMethodManager::GetInstance() {
-  return InputMethodManagerImpl::GetInstance();
+  DCHECK(g_input_method_manager);
+  return g_input_method_manager;
 }
 
 }  // namespace input_method
 }  // namespace chromeos