cros: Hide stylus tools on various sign-in screens, disable active mode when inserting stylus.

ash/common/system/chromeos/palette/palette_tool_manager.cc

 // Copyright 2016 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 "ash/common/system/chromeos/palette/palette_tool_manager.h"
 
 #include <algorithm>
 
 #include "ash/common/system/chromeos/palette/palette_tool.h"
 #include "ash/resources/vector_icons/vector_icons.h"
@@ skipping 88 matching lines @@
   }
 
   return views;
 }
 
 void PaletteToolManager::NotifyViewsDestroyed() {
   for (std::unique_ptr<PaletteTool>& tool : tools_)
     tool->OnViewDestroyed();
 }
 
+void PaletteToolManager::DisableActiveTool(PaletteGroup group) {
+  PaletteToolId tool_id = GetActiveTool(group);
+  if (tool_id != PaletteToolId::NONE)
+    DeactivateTool(tool_id);
+}
+
 void PaletteToolManager::EnableTool(PaletteToolId tool_id) {
   ActivateTool(tool_id);
 }
 
 void PaletteToolManager::DisableTool(PaletteToolId tool_id) {
   DeactivateTool(tool_id);
 }
 
 void PaletteToolManager::HidePalette() {
   delegate_->HidePalette();
@@ skipping 15 matching lines @@
 PaletteTool* PaletteToolManager::FindToolById(PaletteToolId tool_id) const {
   for (const std::unique_ptr<PaletteTool>& tool : tools_) {
     if (tool->GetToolId() == tool_id)
       return tool.get();
   }
 
   return nullptr;
 }
 
 }  // namespace ash