Add GetPluginRefererURL to PPB_URLUtil_Dev interface to get the 'Referer' HTTP header value that wa…

ppapi/tests/test_url_util.cc

Index: ppapi/tests/test_url_util.cc
===================================================================
--- ppapi/tests/test_url_util.cc	(revision 219784)
+++ ppapi/tests/test_url_util.cc	(working copy)
@@ -28,6 +28,7 @@
   RUN_TEST(DocumentCanAccessDocument, filter);
   RUN_TEST(GetDocumentURL, filter);
   RUN_TEST(GetPluginInstanceURL, filter);
+  RUN_TEST(GetPluginRefererURL, filter);
 }
 
 std::string TestURLUtil::TestCanonicalize() {
@@ -136,3 +137,9 @@
   ASSERT_EQ(url.AsString(), "http://a.b.c/test");
   PASS();
 }
+
+std::string TestURLUtil::TestGetPluginRefererURL() {
+  pp::Var url = util_->GetPluginRefererURL(instance_);
+  ASSERT_TRUE(url.is_undefined());
+  PASS();
+}