Add create note palette action.

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index efea66b7c75610d82abd09e3d6fa8b5b0f166c56..a1656b483554b31a88ccccbb922e30ad4a1b78b5 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -82,8 +82,12 @@ class MediaDelegateImpl : public MediaDelegate {
 
 class PaletteDelegateImpl : public PaletteDelegate {
  public:
-  PaletteDelegateImpl() {};
-  ~PaletteDelegateImpl() override {};
+  PaletteDelegateImpl() {}
+  ~PaletteDelegateImpl() override {}
+
+  // PaletteDelegate:
+  void CreateNote() override {}
+  bool HasNoteApp() override { return false; }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PaletteDelegateImpl);