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

chrome/browser/resources/extensions/extensions.html

Index: chrome/browser/resources/extensions/extensions.html
diff --git a/chrome/browser/resources/extensions/extensions.html b/chrome/browser/resources/extensions/extensions.html
index 3a6afa6d260d617aa532deed64dabc1c38ac88d9..153efef1ee3c773e240fe241866159d1d2f06c59 100644
--- a/chrome/browser/resources/extensions/extensions.html
+++ b/chrome/browser/resources/extensions/extensions.html
@@ -24,7 +24,7 @@
 <script src="chrome://resources/js/cr/ui/focus_outline_manager.js"></script>
 <script src="chrome://resources/js/cr/ui/overlay.js"></script>
 
-<if expr="pp_ifdef('chromeos')">
+<if expr="chromeos">
 <link rel="stylesheet" href="chrome://resources/css/list.css">
 <link rel="stylesheet" href="chromeos/kiosk_apps.css">
 <script src="chrome://resources/js/cr/event_target.js"></script>
@@ -48,7 +48,7 @@
   <include src="extension_error_overlay.html">
   <include src="pack_extension_overlay.html">
   <include src="../../../../ui/webui/resources/html/alert_overlay.html">
-<if expr="pp_ifdef('chromeos')">
+<if expr="chromeos">
     <include src="chromeos/kiosk_apps.html">
     <include src="chromeos/kiosk_app_disable_bailout_confirm.html">
 </if>
@@ -80,7 +80,7 @@
           i18n-content="extensionSettingsLoadUnpackedButton"></button>
       <button id="pack-extension"
           i18n-content="extensionSettingsPackButton"></button>
-<if expr="pp_ifdef('chromeos')">
+<if expr="chromeos">
       <button id="add-kiosk-app"
           i18n-content="addKioskAppButton" hidden></button>
 </if>