Bug 471700 - reftest for native-widgets fail for fennec, but pass in firefox [r=dbaron]

layout/reftests/native-theme/reftest.list

@@ -11,19 +11,19 @@
 
 # The following tests will fail if the platform does not have native
 # theme support (which all platforms should have).
-!= text-input-native.html text-input-nonnative.html
+fails-if(!nativeThemePref) != text-input-native.html text-input-nonnative.html
 == text-input-nonnative-when-styled.html text-input-nonnative-when-styled-ref.html
-!= textarea-native.html textarea-nonnative.html
+fails-if(!nativeThemePref) != textarea-native.html textarea-nonnative.html
 == textarea-nonnative-when-styled.html textarea-nonnative-when-styled-ref.html
-!= button-native.html button-nonnative.html
+fails-if(!nativeThemePref) != button-native.html button-nonnative.html
 == button-nonnative-when-styled.html button-nonnative-when-styled-ref.html
-!= combobox-native.html combobox-nonnative.html
+fails-if(!nativeThemePref) != combobox-native.html combobox-nonnative.html
 == combobox-nonnative-when-styled.html combobox-nonnative-when-styled-ref.html
-!= listbox-native.html listbox-nonnative.html
+fails-if(!nativeThemePref) != listbox-native.html listbox-nonnative.html
 == listbox-nonnative-when-styled.html listbox-nonnative-when-styled-ref.html
-!= radio-native.html radio-nonnative.html
+fails-if(!nativeThemePref) != radio-native.html radio-nonnative.html
 == radio-still-native-when-styled.html radio-still-native-when-styled-ref.html
-!= checkbox-native.html checkbox-nonnative.html
+fails-if(!nativeThemePref) != checkbox-native.html checkbox-nonnative.html
 == checkbox-still-native-when-styled.html checkbox-still-native-when-styled-ref.html
 == native-theme-disabled-cascade-levels.html native-theme-disabled-cascade-levels-ref.html
 
@@ -41,7 +41,7 @@ skip-if(MOZ_WIDGET_TOOLKIT!="windows") != 403458-winmenu-ltr.xul 403458-winmenu-
 == 492155-3.html about:blank
 != 492155-4.html about:blank
 
-== box-shadow-styling.html box-shadow-styling-ref.html
+fails-if(!nativeThemePref) == box-shadow-styling.html box-shadow-styling-ref.html
 
 # RTL mirroring tests
 == checkbox-not-mirrored-when-rtl.html checkbox-not-mirrored-when-rtl-ref.html

layout/tools/reftest/reftest.js

@@ -312,6 +312,14 @@ function ReadManifest(aURL)
     sandbox.windowsDefaultTheme = (getComputedStyle(box, null).display == "none");
     document.documentElement.removeChild(box);
 
+    var prefs = CC["@mozilla.org/preferences-service;1"].
+                getService(CI.nsIPrefBranch2);
+    try {
+        sandbox.nativeThemePref = !prefs.getBoolPref("mozilla.widget.disable-native-theme");
+    } catch (e) {
+        sandbox.nativeThemePref = true;
+    }
+
     var line = {value:null};
     var lineNo = 0;
     var urlprefix = "";