Disable ChromeNetworkServiceBrowserTest.EncryptedCookies on Windows.

The test is failing flakily, at least on Win7.

Bug: 868667
Change-Id: If9604610aa51a5754795bc6e5b6b44c06f486af8
Reviewed-on: https://chromium-review.googlesource.com/1155093Reviewed-by: Clark DuVall <cduvall@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579071}

chrome/browser/chrome_network_service_browsertest.cc

@@ -96,7 +96,16 @@ IN_PROC_BROWSER_TEST_F(ChromeNetworkServiceBrowserTest, PRE_EncryptedCookies) {
   EXPECT_EQ(kCookieValue, cookies[0].Value());
 }
 
-IN_PROC_BROWSER_TEST_F(ChromeNetworkServiceBrowserTest, EncryptedCookies) {
+#if defined(OS_WIN)
+// The cookies.size() ASSERT is failing flakily on the Win7 bots.
+// See https://crbug.com/868667
+#define MAYBE_EncryptedCookies DISABLED_EncryptedCookies
+#else
+#define MAYBE_EncryptedCookies EncryptedCookies
+#endif
+
+IN_PROC_BROWSER_TEST_F(ChromeNetworkServiceBrowserTest,
+                       MAYBE_EncryptedCookies) {
 #if defined(OS_MACOSX)
   // |NetworkServiceTestHelper| doesn't work on browser_tests on macOS:
   // crbug.com/843324.