Remove pp_ifdef from resource files in chrome/browser and chrome/renderer.

chrome/browser/resources/plugins.html

Index: chrome/browser/resources/plugins.html
diff --git a/chrome/browser/resources/plugins.html b/chrome/browser/resources/plugins.html
index 6da4e766f7dd71f04f515237755f1d8f85f51805..02204e10f81a534ea4ba01af734c4436e3cdaf29 100644
--- a/chrome/browser/resources/plugins.html
+++ b/chrome/browser/resources/plugins.html
@@ -4,7 +4,7 @@
 <meta charset="utf-8">
 <title i18n-content="pluginsTitle"></title>
 <link rel="stylesheet" href="plugins.css">
-<if expr="pp_ifdef('chromeos')">
+<if expr="chromeos">
   <link rel="stylesheet"
       href="chrome://resources/css/chromeos/ui_account_tweaks.css">
 </if>
@@ -205,7 +205,7 @@
 <script src="chrome://resources/js/util.js"></script>
 <script src="chrome://resources/js/cr.js"></script>
 <script src="chrome://plugins/plugins.js"></script>
-<if expr="pp_ifdef('chromeos')">
+<if expr="chromeos">
   <script src="chrome://resources/js/chromeos/ui_account_tweaks.js"></script>
 </if>