Fix Aura can't provide accurate cursor hotspot info.

ui/gfx/icon_util.h

Index: ui/gfx/icon_util.h
diff --git a/ui/gfx/icon_util.h b/ui/gfx/icon_util.h
index 960018ece0fe07839d2b7e801738e21e776a71f0..e542caec0e1dbb2d323174d738f7127f26f99bca 100644
--- a/ui/gfx/icon_util.h
+++ b/ui/gfx/icon_util.h
@@ -141,6 +141,10 @@ class GFX_EXPORT IconUtil {
                                                     const void* dib_bits,
                                                     size_t dib_size);
 
+  // Given a valid HICON handle representing an icon, this function retrieves
+  // the hot spot of the icon.
+  static gfx::Point GetHotSpotFromHICON(HICON icon);
+
  private:
   // The icon format is published in the MSDN but there is no definition of
   // the icon file structures in any of the Windows header files so we need to