Magnifier border is now more visible on light backgrounds.

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 525856655d0aa23c7ac639e4998b240b5e47d42b..9165bbd36aacaf7cd010e86b110122ccf7173cfc 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -87,6 +87,9 @@ class PaletteDelegateImpl : public PaletteDelegate {
   // PaletteDelegate:
   void CreateNote() override {}
   bool HasNoteApp() override { return false; }
+  void SetPartialMagnifierState(bool enabled) override {}
+  void TakeScreenshot() override {}
+  void TakePartialScreenshot() override {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PaletteDelegateImpl);