Add --resourcePath flag to the test program.

Review URL: https://codereview.chromium.org/12521016

git-svn-id: http://skia.googlecode.com/svn/trunk@8252 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/StreamTest.cpp b/tests/StreamTest.cpp
index 2b86e7b..d0a8507 100644
--- a/tests/StreamTest.cpp
+++ b/tests/StreamTest.cpp
@@ -155,8 +155,8 @@
     }
     delete[] dst;
 
-    if (skiatest::Test::GetTmpDir()) {
-        test_filestreams(reporter, skiatest::Test::GetTmpDir());
+    if (!skiatest::Test::GetTmpDir().isEmpty()) {
+        test_filestreams(reporter, skiatest::Test::GetTmpDir().c_str());
     }
 }