Fix flaky PPAPITest.FlashClipboard.

ppapi/tests/test_utils.cc

Index: ppapi/tests/test_utils.cc
diff --git a/ppapi/tests/test_utils.cc b/ppapi/tests/test_utils.cc
index fb5f7625ab3927e8006ef27a7f7bd4541a9e086a..df13fde8b21399b85407f5ff8ad0af870189846d 100644
--- a/ppapi/tests/test_utils.cc
+++ b/ppapi/tests/test_utils.cc
@@ -5,10 +5,17 @@
 #include "ppapi/tests/test_utils.h"
 
 #include <stdio.h>
+#if defined(_MSC_VER)
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
 
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/cpp/module.h"
 
+const int kActionTimeoutMs = 10000;
+
 const PPB_Testing_Dev* GetTestingInterface() {
   static const PPB_Testing_Dev* g_testing_interface =
       reinterpret_cast<PPB_Testing_Dev const*>(
@@ -24,6 +31,14 @@ std::string ReportError(const char* method, int32_t error) {
   return result;
 }
 
+void PlatformSleep(int duration_ms) {
+#if defined(_MSC_VER)
+  ::Sleep(duration_ms);
+#else
+  usleep(duration_ms * 1000);
+#endif
+}
+
 TestCompletionCallback::TestCompletionCallback(PP_Instance instance)
     : have_result_(false),
       result_(PP_OK_COMPLETIONPENDING),