- Fix use-after-return in ReleaseAndWaitForDestructor if it times out

while running unit tests.
- Increase PluginTest PDF load timeout.

tests/unittests/plugin_unittest.cc

@@ -51,7 +51,11 @@ const char kPdfHtmlUrl[] = "http://tests/pdf.html";
 const char kPdfDirectUrl[] = "http://tests/pdf.pdf";
 
 // Delay waiting for iframe tests to load the PDF file.
+#if defined(OS_LINUX)
+const int64 kPdfLoadDelayMs = 7000;
+#else
 const int64 kPdfLoadDelayMs = 5000;
+#endif
 
 // Browser-side test handler.
 class PluginTestHandler : public RoutingTestHandler,