[PPAPI] Added VarResource_Dev class.

ppapi/tests/test_file_system.cc

Index: ppapi/tests/test_file_system.cc
diff --git a/ppapi/tests/test_file_system.cc b/ppapi/tests/test_file_system.cc
index 7badabb4233e79ed632a6a917a9f0179dd0c5337..abcff94c5b7eaa5f165ab2f088662810d3d3d7a5 100644
--- a/ppapi/tests/test_file_system.cc
+++ b/ppapi/tests/test_file_system.cc
@@ -7,7 +7,9 @@
 #include <string.h>
 
 #include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/file_io.h"
 #include "ppapi/cpp/file_system.h"
+#include "ppapi/cpp/resource.h"
 #include "ppapi/tests/test_utils.h"
 #include "ppapi/tests/testing_instance.h"
 
@@ -20,6 +22,7 @@ bool TestFileSystem::Init() {
 void TestFileSystem::RunTests(const std::string& filter) {
   RUN_CALLBACK_TEST(TestFileSystem, Open, filter);
   RUN_CALLBACK_TEST(TestFileSystem, MultipleOpens, filter);
+  RUN_CALLBACK_TEST(TestFileSystem, ResourceConversion, filter);
 }
 
 std::string TestFileSystem::TestOpen() {
@@ -67,3 +70,21 @@ std::string TestFileSystem::TestMultipleOpens() {
 
   PASS();
 }
+
+std::string TestFileSystem::TestResourceConversion() {
+  // Test conversion from file system Resource to FileSystem.
+  pp::FileSystem file_system(instance_, PP_FILESYSTEMTYPE_LOCALTEMPORARY);
+  pp::Resource file_system_resource(file_system);
+  ASSERT_TRUE(pp::FileSystem::ResourceIsFileSystem(file_system_resource));
+  pp::FileSystem file_system_resource_file_system(file_system_resource);
+  ASSERT_FALSE(file_system_resource_file_system.is_null());
+
+  // Test conversion that a non-file system Resource does not register as a
+  // FileSystem. (We cannot test conversion, since this is an assertion on a
+  // debug build.)
+  pp::FileIO non_file_system(instance_);
+  pp::Resource non_file_system_resource(non_file_system);
+  ASSERT_FALSE(pp::FileSystem::ResourceIsFileSystem(non_file_system_resource));
+
+  PASS();
+}