Remove dead code leftover from crrev.com/c/675084

Either 675084 left this code dead or any remaining usage was removed
afterwards. Either way, it's safe to remove now.

My dream of fixing a CL with an identical bug number was narrowly
thwarted. :(

Bug: 788649
Change-Id: Icc408f328be611cff06320f4a93e81d0757e153b
Reviewed-on: https://chromium-review.googlesource.com/788648Reviewed-by: Yuichiro Hanada <yhanada@chromium.org>
Commit-Queue: Blake O'Hare <blakeo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#519563}

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

@@ -1278,10 +1278,6 @@ void InputMethodManagerImpl::OverrideKeyboardUrlRef(const std::string& keyset) {
     keyboard_controller->Reload();
 }
 
-bool InputMethodManagerImpl::IsEmojiHandwritingVoiceOnImeMenuEnabled() {
-  return base::FeatureList::IsEnabled(features::kEHVInputOnImeMenu);
-}
-
 void InputMethodManagerImpl::SetImeMenuFeatureEnabled(ImeMenuFeature feature,
                                                       bool enabled) {
   const uint32_t original_state = features_enabled_state_;

chrome/browser/chromeos/input_method/input_method_manager_impl.h

@@ -181,7 +181,6 @@ class InputMethodManagerImpl : public InputMethodManager,
       const std::vector<InputMethodManager::MenuItem>& items) override;
   void MaybeNotifyImeMenuActivationChanged() override;
   void OverrideKeyboardUrlRef(const std::string& keyset) override;
-  bool IsEmojiHandwritingVoiceOnImeMenuEnabled() override;
   void SetImeMenuFeatureEnabled(ImeMenuFeature feature, bool enabled) override;
   bool GetImeMenuFeatureEnabled(ImeMenuFeature feature) const override;
   void NotifyObserversImeExtraInputStateChange() override;

ui/base/ime/chromeos/input_method_manager.h

@@ -318,10 +318,6 @@ class UI_BASE_IME_EXPORT InputMethodManager {
   // it indicates that we should override the url back with the keyboard keyset.
   virtual void OverrideKeyboardUrlRef(const std::string& keyset) = 0;
 
-  // Returns whether the extra inputs: emoji, handwriting and voice inputs on
-  // opt-in IME menu has been enabled.
-  virtual bool IsEmojiHandwritingVoiceOnImeMenuEnabled() = 0;
-
   // Enables or disables some advanced features, e.g. handwiring, voices input.
   virtual void SetImeMenuFeatureEnabled(ImeMenuFeature feature,
                                         bool enabled) = 0;

ui/base/ime/chromeos/mock_input_method_manager.cc

@@ -187,10 +187,6 @@ void MockInputMethodManager::MaybeNotifyImeMenuActivationChanged() {}
 void MockInputMethodManager::OverrideKeyboardUrlRef(const std::string& keyset) {
 }
 
-bool MockInputMethodManager::IsEmojiHandwritingVoiceOnImeMenuEnabled() {
-  return true;
-}
-
 void MockInputMethodManager::SetImeMenuFeatureEnabled(ImeMenuFeature feature,
                                                       bool enabled) {
   if (enabled)

ui/base/ime/chromeos/mock_input_method_manager.h

@@ -104,7 +104,6 @@ class UI_BASE_IME_EXPORT MockInputMethodManager : public InputMethodManager {
       const std::vector<InputMethodManager::MenuItem>& items) override;
   void MaybeNotifyImeMenuActivationChanged() override;
   void OverrideKeyboardUrlRef(const std::string& keyset) override;
-  bool IsEmojiHandwritingVoiceOnImeMenuEnabled() override;
   void SetImeMenuFeatureEnabled(ImeMenuFeature feature, bool enabled) override;
   bool GetImeMenuFeatureEnabled(ImeMenuFeature feature) const override;
   void NotifyObserversImeExtraInputStateChange() override;