Cleanup: Mark conflict UI resources as Windows-only.

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
===================================================================
--- chrome/app/chromium_strings.grd	(revision 266243)
+++ chrome/app/chromium_strings.grd	(working copy)
@@ -598,15 +598,17 @@
         Why am I seeing this?
       </message>
       <!-- about:conflicts strings -->
-      <message name="IDS_CONFLICTS_CHECK_PAGE_TITLE_LONG" desc="The long title on the compatibility page">
-        Modules loaded into Chromium
-      </message>
-      <message name="IDS_CONFLICTS_CHECK_WARNING_CONFIRMED" desc="Warning label on the compatibility page">
-        This module is known to conflict with Chromium.
-      </message>
-      <message name="IDS_CONFLICTS_CHECK_WARNING_SUSPECTED" desc="Warning label on the compatibility page">
-        A module with the same name has been known to conflict with Chromium.
-      </message>
+      <if expr="is_win">
+        <message name="IDS_CONFLICTS_CHECK_PAGE_TITLE_LONG" desc="The long title on the compatibility page">
+          Modules loaded into Chromium
+        </message>
+        <message name="IDS_CONFLICTS_CHECK_WARNING_CONFIRMED" desc="Warning label on the compatibility page">
+          This module is known to conflict with Chromium.
+        </message>
+        <message name="IDS_CONFLICTS_CHECK_WARNING_SUSPECTED" desc="Warning label on the compatibility page">
+          A module with the same name has been known to conflict with Chromium.
+        </message>
+      </if>
       <!-- chrome://crashes strings -->
       <message name="IDS_CRASHES_DISABLED_MESSAGE" desc="The explanatory message for chrome://crashes when crash reporting is disabled">
         Crash reporting is not available in Chromium.