Add UMA stats for pen palette

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
index 5d5f48510d7e1d758636f06c617f00010fd182ff..fee896dd46623de0346d10e91e57bfdaa85f1917 100644
--- a/ash/common/system/chromeos/palette/palette_ids.cc
+++ b/ash/common/system/chromeos/palette/palette_ids.cc
@@ -39,4 +39,38 @@ std::string PaletteGroupToString(PaletteGroup group) {
   return std::string();
 }
 
+PaletteTrayOptions PaletteToolIdToPaletteTrayOptions(PaletteToolId tool_id) {
+  switch (tool_id) {
+    case PaletteToolId::NONE:
+      return PALETTE_OPTIONS_COUNT;
+    case PaletteToolId::CREATE_NOTE:
+      return PALETTE_NEW_NOTE;
+    case PaletteToolId::CAPTURE_REGION:
+      return PALETTE_CAPTURE_REGION;
+    case PaletteToolId::CAPTURE_SCREEN:
+      return PALETTE_CAPTURE_SCREEN;
+    case PaletteToolId::LASER_POINTER:
+      return PALETTE_LASER_POINTER;
+    case PaletteToolId::MAGNIFY:
+      return PALETTE_MAGNIFY;
+  }
+
+  NOTREACHED();
+  return PALETTE_OPTIONS_COUNT;
+}
+
+PaletteModeCancelType PaletteToolIdToPaletteModeCancelType(
+    PaletteToolId tool_id,
+    bool is_switched) {
+  PaletteModeCancelType type = PALETTE_MODE_CANCEL_TYPE_COUNT;
+  if (tool_id == PaletteToolId::LASER_POINTER) {
+    return is_switched ? PALETTE_MODE_LASER_POINTER_SWITCHED
+                       : PALETTE_MODE_LASER_POINTER_CANCELLED;
+  } else if (tool_id == PaletteToolId::MAGNIFY) {
+    return is_switched ? PALETTE_MODE_MAGNIFY_SWITCHED
+                       : PALETTE_MODE_MAGNIFY_CANCELLED;
+  }
+  return type;
+}
+
 }  // namespace ash