Throw exceptions on all failed cross-origin access checks.

LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html

Index: LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
diff --git a/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html b/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
index efe7d0a023b740732e452be5abe8d9ccc33c4d18..4e468379e52f3027c8bc1ad460ea22f2ce96cefe 100644
--- a/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
+++ b/LayoutTests/http/tests/plugins/resources/cross-frame-object-access.html
@@ -56,15 +56,19 @@ function runTest() {
     }
 
     // Try accessing top.document using NPN_EVALUATE
-    var l = document.plugin.testEvaluate('top.document')
-    if (l) {
+    try {
+        var documentViaTestEvaluate = document.plugin.testEvaluate('top.document')
+    } catch (e) {};
+    if (documentViaTestEvaluate) {
         debug('could access top.document');
         numErrors++;
     }
 
     // Try accessing top.document using NPN_GetProperty
-    var l = document.plugin.testGetProperty('top', 'document')
-    if (l) {
+    try {
+        var documentViaTestGetProperty = document.plugin.testGetProperty('top', 'document')
+    } catch (e) {};
+    if (documentViaTestGetProperty) {
         debug('could access top.document');
         numErrors++;
     }