ExtensionGalleryInstallApiTest.InstallAndUninstall is failing on 'XP Tests' bot.

chrome/browser/extensions/extension_gallery_install_apitest.cc

Index: chrome/browser/extensions/extension_gallery_install_apitest.cc
diff --git a/chrome/browser/extensions/extension_gallery_install_apitest.cc b/chrome/browser/extensions/extension_gallery_install_apitest.cc
index 8c704a98102d4558ad17cb11dcf27f8b8c78c53a..916cda88dac62d045a97b1a6cc3c4d37f0e7a9f3 100644
--- a/chrome/browser/extensions/extension_gallery_install_apitest.cc
+++ b/chrome/browser/extensions/extension_gallery_install_apitest.cc
@@ -18,7 +18,14 @@ class ExtensionGalleryInstallApiTest : public ExtensionApiTest {
   }
 };
 
-IN_PROC_BROWSER_TEST_F(ExtensionGalleryInstallApiTest, InstallAndUninstall) {
+// http://crbug.com/55642 - failing on XP.
+#if defined (OS_WIN)
+#define MAYBE_InstallAndUninstall FAILS_InstallAndUninstall
+#else
+#define MAYBE_InstallAndUninstall InstallAndUninstall
+#endif
+IN_PROC_BROWSER_TEST_F(ExtensionGalleryInstallApiTest,
+                       MAYBE_InstallAndUninstall) {
   host_resolver()->AddRule("www.example.com", "127.0.0.1");
   ASSERT_TRUE(test_server()->Start());