[DeleteIt] Remove unused ShowMultipleSuggestions

In AssistiveWindowController, the method is no longer used because
emoji suggester uses SetAssistiveWindowProperties.


Bug: 1102219
Change-Id: I7286bf0e297662bd26e1e7a87116b20f723ae094
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2473778Reviewed-by: Keith Lee <keithlee@chromium.org>
Commit-Queue: My Nguyen <myy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820656}

chrome/browser/chromeos/input_method/assistive_window_controller.cc

@@ -172,11 +172,6 @@ void AssistiveWindowController::ShowSuggestion(
   suggestion_window_view_->Show(details);
 }
 
-// TODO(crbug/1102219): Method unused. Remove all definitions and references.
-void AssistiveWindowController::ShowMultipleSuggestions(
-    const std::vector<base::string16>& suggestions) {
-}
-
 void AssistiveWindowController::SetButtonHighlighted(
     const ui::ime::AssistiveWindowButton& button,
     bool highlighted) {

chrome/browser/chromeos/input_method/assistive_window_controller.h

@@ -73,8 +73,6 @@ class AssistiveWindowController : public views::WidgetObserver,
   void SetAssistiveWindowProperties(
       const AssistiveWindowProperties& window) override;
   void ShowSuggestion(const ui::ime::SuggestionDetails& details) override;
-  void ShowMultipleSuggestions(
-      const std::vector<base::string16>& suggestions) override;
   void SetButtonHighlighted(const ui::ime::AssistiveWindowButton& button,
                             bool highlighted) override;
   void AcceptSuggestion(const base::string16& suggestion) override;

chrome/browser/chromeos/input_method/emoji_suggester_unittest.cc

@@ -80,12 +80,6 @@ class TestSuggestionHandler : public SuggestionHandlerInterface {
   void OnSuggestionsChanged(
       const std::vector<std::string>& suggestions) override {}
 
-  bool ShowMultipleSuggestions(int context_id,
-                               const std::vector<base::string16>& candidates,
-                               std::string* error) override {
-    return false;
-  }
-
   void ClickButton(const ui::ime::AssistiveWindowButton& button) override {}
 
   bool AcceptSuggestionCandidate(int context_id,

chrome/browser/chromeos/input_method/input_method_engine.cc

@@ -137,25 +137,6 @@ void InputMethodEngine::OnSuggestionsChanged(
   observer_->OnSuggestionsChanged(suggestions);
 }
 
-bool InputMethodEngine::ShowMultipleSuggestions(
-    int context_id,
-    const std::vector<base::string16>& suggestions,
-    std::string* error) {
-  if (!IsActive()) {
-    *error = kErrorNotActive;
-    return false;
-  }
-  if (context_id != context_id_ || context_id_ == -1) {
-    *error = kErrorWrongContext;
-    return false;
-  }
-  IMEAssistiveWindowHandlerInterface* aw_handler =
-      ui::IMEBridge::Get()->GetAssistiveWindowHandler();
-  if (aw_handler)
-    aw_handler->ShowMultipleSuggestions(suggestions);
-  return true;
-}
-
 bool InputMethodEngine::SetButtonHighlighted(
     int context_id,
     const ui::ime::AssistiveWindowButton& button,

chrome/browser/chromeos/input_method/input_method_engine.h

@@ -118,10 +118,6 @@ class InputMethodEngine : public InputMethodEngineBase,
   void OnSuggestionsChanged(
       const std::vector<std::string>& suggestions) override;
 
-  bool ShowMultipleSuggestions(int context_id,
-                               const std::vector<base::string16>& suggestions,
-                               std::string* error) override;
-
   bool SetButtonHighlighted(int context_id,
                             const ui::ime::AssistiveWindowButton& button,
                             bool highlighted,

chrome/browser/chromeos/input_method/personal_info_suggester_unittest.cc

@@ -71,12 +71,6 @@ class TestSuggestionHandler : public SuggestionHandlerInterface {
     previous_suggestions_ = suggestions;
   }
 
-  bool ShowMultipleSuggestions(int context_id,
-                               const std::vector<base::string16>& candidates,
-                               std::string* error) override {
-    return false;
-  }
-
   void ClickButton(const ui::ime::AssistiveWindowButton& button) override {
     button_clicked_ = button.id;
   }

chrome/browser/chromeos/input_method/suggestion_handler_interface.h

@@ -39,11 +39,6 @@ class SuggestionHandlerInterface {
   virtual void OnSuggestionsChanged(
       const std::vector<std::string>& suggestions) = 0;
 
-  virtual bool ShowMultipleSuggestions(
-      int context_id,
-      const std::vector<base::string16>& candidates,
-      std::string* error) = 0;
-
   // Highlights or unhighlights a given assistive button based on the given
   // parameters. No-op if context_id doesn't match or engine is not active.
   virtual bool SetButtonHighlighted(

ui/base/ime/chromeos/ime_assistive_window_handler_interface.h

@@ -42,9 +42,6 @@ class COMPONENT_EXPORT(UI_BASE_IME_CHROMEOS)
 
   virtual void ShowSuggestion(const ui::ime::SuggestionDetails& details) {}
 
-  virtual void ShowMultipleSuggestions(
-      const std::vector<base::string16>& suggestions) {}
-
   // Highlights or unhighlights a given assistive button based on the given
   // parameters.
   virtual void SetButtonHighlighted(