Add comment that directory reader isn't implemented out of process.

chrome/test/ui/ppapi_uitest.cc

Index: chrome/test/ui/ppapi_uitest.cc
diff --git a/chrome/test/ui/ppapi_uitest.cc b/chrome/test/ui/ppapi_uitest.cc
index 8446fb300596e7f4f06b33033a1cbaf35f274cc2..3f196c6cb91f4c287cb235f20738c58896249be4 100644
--- a/chrome/test/ui/ppapi_uitest.cc
+++ b/chrome/test/ui/ppapi_uitest.cc
@@ -412,13 +412,10 @@ TEST_PPAPI_OUT_OF_PROCESS(FlashClipboard)
 #endif
 
 // Flaky on Mac + Linux, maybe http://codereview.chromium.org/7094008
+// Not implemented out of process: http://crbug.com/106129
 TEST_F(PPAPITest, MAYBE_DirectoryReader) {
   RunTestViaHTTP("DirectoryReader");
 }
-// http://crbug.com/89961
-TEST_F(OutOfProcessPPAPITest, FAILS_DirectoryReader) {
-  RunTestViaHTTP("DirectoryReader");
-}
 
 #if defined(ENABLE_P2P_APIS)
 // Flaky. http://crbug.com/84294