Magnifier border is now more visible on light backgrounds.

ash/common/palette_delegate.h

Index: ash/common/palette_delegate.h
diff --git a/ash/common/palette_delegate.h b/ash/common/palette_delegate.h
index 34d0d11ad87e9c06d8a46959836a4ad04d893ac4..2c0d241ffacd39b093f70446b09ae7c83301dccb 100644
--- a/ash/common/palette_delegate.h
+++ b/ash/common/palette_delegate.h
@@ -22,6 +22,15 @@ class PaletteDelegate {
   // Returns true if there is a note-taking application available.
   virtual bool HasNoteApp() = 0;
 
+  // Enables or disables the partial magnifier.
+  virtual void SetPartialMagnifierState(bool enabled) = 0;
+
+  // Take a screenshot of the entire window.
+  virtual void TakeScreenshot() = 0;
+
+  // Take a screenshot of a user-selected region.
+  virtual void TakePartialScreenshot() = 0;
+
  private:
   DISALLOW_ASSIGN(PaletteDelegate);
 };