[ios] Disabled LoadsCorrectHTML on device.

ios/web/web_state/js/crw_js_post_request_loader_unittest.mm

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "ios/web/web_state/js/crw_js_post_request_loader.h"
 
 #import <WebKit/WebKit.h>
 
 #import "base/mac/foundation_util.h"
 #import "base/mac/scoped_nsobject.h"
@@ skipping 20 matching lines @@
      "    base64data = reader.result;"
      "    window.webkit.messageHandlers.XHRSendHandler.postMessage(base64data);"
      "  };"
      "};";
 
 // Tests that the POST request is correctly executed through XMLHttpRequest.
 // TODO(crbug.com/592034): This test is flaky on device.
 #if TARGET_IPHONE_SIMULATOR
 #define MAYBE_LoadsCorrectHTML LoadsCorrectHTML
 #else
-#define MAYBE_LoadsCorrectHTML FLAKY_LoadsCorrectHTML
+#define MAYBE_LoadsCorrectHTML DISABLED_LoadsCorrectHTML
 #endif
 TEST_F(CRWJSPOSTRequestLoaderTest, MAYBE_LoadsCorrectHTML) {
   // Set up necessary objects.
   scoped_nsobject<CRWJSPOSTRequestLoader> loader(
       [[CRWJSPOSTRequestLoader alloc] init]);
   scoped_nsobject<WKWebView> web_view(
       web::CreateWKWebView(CGRectZero, GetBrowserState()));
   WKUserContentController* contentController =
       web_view.get().configuration.userContentController;
   scoped_nsobject<CRWWKScriptMessageRouter> messageRouter(
@@ skipping 47 matching lines @@
     return complete;
   });
 
   // Clean up installed script handler.
   [messageRouter removeScriptMessageHandlerForName:@"XHRSendHandler"
                                            webView:web_view];
 }
 
 }  // namespace
 }  // namespace base