[Mac] Use correct stroke color for toolbar top edge in Material Design.

chrome/browser/themes/theme_properties.cc

Index: chrome/browser/themes/theme_properties.cc
diff --git a/chrome/browser/themes/theme_properties.cc b/chrome/browser/themes/theme_properties.cc
index 610448b94daa4163b8657e28d273b86b40be77bc..7707f24a92ad99259314ab97388665191e7da8a9 100644
--- a/chrome/browser/themes/theme_properties.cc
+++ b/chrome/browser/themes/theme_properties.cc
@@ -147,7 +147,7 @@ const SkColor kDefaultColorToolbarButtonStrokeInactive =
     SkColorSetARGB(75, 99, 99, 99);
 const SkColor kDefaultColorToolbarBezel = SkColorSetRGB(204, 204, 204);
 const SkColor kDefaultColorToolbarStroke[] = {
-    SkColorSetRGB(103, 103, 103), SkColorSetARGB(37, 0, 0, 0)};
+    SkColorSetRGB(103, 103, 103), SkColorSetARGB(76, 0, 0, 0)};
 const SkColor kDefaultColorToolbarStrokeInactive = SkColorSetRGB(163, 163, 163);
 const SkColor kDefaultColorToolbarIncognitoStroke[] = {
     SkColorSetRGB(255, 0, 0), SkColorSetARGB(63, 0, 0, 0)};