Fixed based on @TomMalbran's feedback.

Author: larz0

src/index.html

@@ -29,10 +29,6 @@
 
     <!-- CSS/LESS -->
 
-    <!-- Temporary CSS for unobtrusive scrollbars. This can't live in LESS because it uses
-         nonstandard WebKit-specific syntax. -->
-    <link rel="stylesheet" href="styles/brackets_scrollbars.css">
-
     <!-- NOTE: All scripts must be external for Chrome App support: http://developer.chrome.com/apps/app_csp.html -->
 
     <!-- Warn about failed cross origin requests in Chrome -->

src/styles/brackets_shared.less

@@ -58,5 +58,8 @@
 // Codemirror styling overrides
 @import url(brackets_codemirror_override.less);
 
-// styling for file tree
+// Styling for file tree
 @import url(jsTreeTheme.less);
+
+// Styling for scrollbars
+@import url(brackets_scrollbars.less);