Palette tool laser prototype.

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 c84bc00cb1226828694968214e63020337d39121..93f41438abf575423978565487f1f8a07adbbfa3 100644
--- a/ash/common/palette_delegate.h
+++ b/ash/common/palette_delegate.h
@@ -57,6 +57,10 @@ class PaletteDelegate {
   // Take a screenshot of a user-selected region.
   virtual void TakePartialScreenshot() = 0;
 
+  // Called when the laser pointer has been enabled or disabled.
+  virtual void OnLaserPointerEnabled() = 0;
+  virtual void OnLaserPointerDisabled() = 0;
+
  private:
   DISALLOW_ASSIGN(PaletteDelegate);
 };