Move a bunch of ash-only vector icons to ash/.

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

Index: ash/common/system/chromeos/palette/palette_tray.cc
diff --git a/ash/common/system/chromeos/palette/palette_tray.cc b/ash/common/system/chromeos/palette/palette_tray.cc
index 80ecc3bb8117eda76ff491066ee15d2dd80d69b0..0fb895f1abfc52b898ea345bc56a681cbc44f5d6 100644
--- a/ash/common/system/chromeos/palette/palette_tray.cc
+++ b/ash/common/system/chromeos/palette/palette_tray.cc
@@ -344,9 +344,10 @@ void PaletteTray::SetIconBorderForShelfAlignment() {
 }
 
 void PaletteTray::UpdateTrayIcon() {
-  gfx::VectorIconId icon = palette_tool_manager_->GetActiveTrayIcon(
-      palette_tool_manager_->GetActiveTool(ash::PaletteGroup::MODE));
-  icon_->SetImage(CreateVectorIcon(icon, kShelfIconSize, kShelfIconColor));
+  icon_->SetImage(CreateVectorIcon(
+      palette_tool_manager_->GetActiveTrayIcon(
+          palette_tool_manager_->GetActiveTool(ash::PaletteGroup::MODE)),
+      kShelfIconSize, kShelfIconColor));
 }
 
 void PaletteTray::OnStylusStateChanged(ui::StylusState stylus_state) {