Disable WebViewTest.Shim_TestAutosizeWithPartialAttributes on Mac as well.

chrome/browser/apps/web_view_browsertest.cc

 // Copyright 2013 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.
 
 #include "apps/ui/native_app_window.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/chrome_content_browser_client.h"
@@ skipping 835 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_TestAutosizeBeforeNavigation) {
   TestHelper("testAutosizeBeforeNavigation", "web_view/shim", NO_TEST_SERVER);
 }
 IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_TestAutosizeRemoveAttributes) {
   TestHelper("testAutosizeRemoveAttributes", "web_view/shim", NO_TEST_SERVER);
 }
 
 // This test is disabled due to being flaky. http://crbug.com/282116
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(OS_MACOSX)
 #define MAYBE_Shim_TestAutosizeWithPartialAttributes \
     DISABLED_Shim_TestAutosizeWithPartialAttributes
 #else
 #define MAYBE_Shim_TestAutosizeWithPartialAttributes \
     Shim_TestAutosizeWithPartialAttributes
 #endif
 IN_PROC_BROWSER_TEST_F(WebViewTest,
                        MAYBE_Shim_TestAutosizeWithPartialAttributes) {
   TestHelper("testAutosizeWithPartialAttributes",
              "web_view/shim",
@@ skipping 1376 matching lines @@
 IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_TestFindAPI_findupdate) {
   TestHelper("testFindAPI_findupdate", "web_view/shim", NO_TEST_SERVER);
 }
 
 // <webview> screenshot capture fails with ubercomp.
 // See http://crbug.com/327035.
 IN_PROC_BROWSER_TEST_F(WebViewCaptureTest,
                        DISABLED_Shim_ScreenshotCapture) {
   TestHelper("testScreenshotCapture", "web_view/shim", NO_TEST_SERVER);
 }