Update extension buttons to Material Design (Mac).

chrome/browser/ui/layout_constants.cc

Index: chrome/browser/ui/layout_constants.cc
diff --git a/chrome/browser/ui/layout_constants.cc b/chrome/browser/ui/layout_constants.cc
index 6cfa6e8e3dbe734d26e02c7f11cd6ce8ae67381e..786b47d621f1bbf923fae8b6dee3e517bb0cb563 100644
--- a/chrome/browser/ui/layout_constants.cc
+++ b/chrome/browser/ui/layout_constants.cc
@@ -29,17 +29,18 @@ int GetLayoutConstant(LayoutConstant constant) {
   const int kTabTopExclusionHeight[] = {0, 0, 0};
   const int kTabstripNewTabButtonOverlap[] = {8, 5, 6};
   const int kTabstripTabOverlap[] = {19, 16, 16};
+  const int kToolbarStandardSpacing[] = {3, 0, 8};
 #else
   const int kTabTopExclusionHeight[] = {2, 0, 0};
   const int kTabstripNewTabButtonOverlap[] = {11, 5, 6};
   const int kTabstripTabOverlap[] = {26, 16, 16};
+  const int kToolbarStandardSpacing[] = {3, 4, 8};
 #endif
   const int kTabstripToolbarOverlap[] = {3, 0, 0};
   const int kToolbarContentShadowHeight[] = {0, 0, 0};
   const int kToolbarContentShadowHeightAsh[] = {2, 0, 0};
   const int kToolbarElementPadding[] = {0, 0, 8};
   const int kToolbarLocationBarRightPadding[] = {0, 4, 8};
-  const int kToolbarStandardSpacing[] = {3, 4, 8};
 
   const int mode = ui::MaterialDesignController::GetMode();
   switch (constant) {