Add palette tool/manager.

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

Index: ash/common/system/chromeos/palette/palette_ids.cc
diff --git a/ash/common/system/chromeos/palette/palette_ids.cc b/ash/common/system/chromeos/palette/palette_ids.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5d5f48510d7e1d758636f06c617f00010fd182ff
--- /dev/null
+++ b/ash/common/system/chromeos/palette/palette_ids.cc
@@ -0,0 +1,42 @@
+// 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_ids.h"
+#include "base/logging.h"
+
+namespace ash {
+
+std::string PaletteToolIdToString(PaletteToolId tool_id) {
+  switch (tool_id) {
+    case PaletteToolId::NONE:
+      return "NONE";
+    case PaletteToolId::CREATE_NOTE:
+      return "CREATE_NOTE";
+    case PaletteToolId::CAPTURE_REGION:
+      return "CAPTURE_REGION";
+    case PaletteToolId::CAPTURE_SCREEN:
+      return "CAPTURE_SCREEN";
+    case PaletteToolId::LASER_POINTER:
+      return "LASER_POINTER";
+    case PaletteToolId::MAGNIFY:
+      return "MAGNIFY";
+  }
+
+  NOTREACHED();
+  return std::string();
+}
+
+std::string PaletteGroupToString(PaletteGroup group) {
+  switch (group) {
+    case PaletteGroup::ACTION:
+      return "ACTION";
+    case PaletteGroup::MODE:
+      return "MODE";
+  }
+
+  NOTREACHED();
+  return std::string();
+}
+
+}  // namespace ash