Tweaks to make the toolkit-views HTTP Auth dialog more Maccy on MAc

ui/views/layout/layout_constants.h

Index: ui/views/layout/layout_constants.h
diff --git a/ui/views/layout/layout_constants.h b/ui/views/layout/layout_constants.h
index 1cee4c00d6962d1cf78b1ac7e2cdb61f5b60316b..d3cf1d2b2753f3f6cbea9b60d6c73a6e7a528810 100644
--- a/ui/views/layout/layout_constants.h
+++ b/ui/views/layout/layout_constants.h
@@ -49,10 +49,18 @@ const int kUnrelatedControlHorizontalSpacing = 12;
 const int kUnrelatedControlLargeHorizontalSpacing = 20;
 
 // Vertical spacing between controls that are logically unrelated.
+#if defined(OS_MACOSX)
+const int kUnrelatedControlVerticalSpacing = 10;
+#else
 const int kUnrelatedControlVerticalSpacing = 20;
+#endif
 
 // Larger vertical spacing between unrelated controls.
+#if defined(OS_MACOSX)
+const int kUnrelatedControlLargeVerticalSpacing = 20;
+#else
 const int kUnrelatedControlLargeVerticalSpacing = 30;
+#endif
 
 // Vertical spacing between the edge of the window and the
 // top or bottom of a button.