Disable WebViewTest.Size for flakiness on Windows.

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/automation/automation_util.h"
@@ skipping 1003 matching lines @@
   // Now close the app while interstitial page being shown in guest.
   apps::ShellWindow* window = GetFirstShellWindow();
   window->GetBaseWindow()->Close();
 }
 
 IN_PROC_BROWSER_TEST_F(WebViewTest, ShimSrcAttribute) {
   ASSERT_TRUE(RunPlatformAppTest("platform_apps/web_view/src_attribute"))
       << message_;
 }
 
-IN_PROC_BROWSER_TEST_F(WebViewTest, Size) {
+// Disabled on Windows for flaky failures: crbug.com/329032
+#if defined(OS_WIN)
+#define MAYBE_Size DISABLED_Size
+#else
+#define MAYBE_Size Size
+#endif
+IN_PROC_BROWSER_TEST_F(WebViewTest, MAYBE_Size) {
   ASSERT_TRUE(RunPlatformAppTest("platform_apps/web_view/size")) << message_;
 }
 
 // This test verifies that prerendering has been disabled inside <webview>.
 // This test is here rather than in PrerenderBrowserTest for testing convenience
 // only. If it breaks then this is a bug in the prerenderer.
 IN_PROC_BROWSER_TEST_F(WebViewTest, NoPrerenderer) {
   ASSERT_TRUE(StartEmbeddedTestServer());
   content::WebContents* guest_web_contents =
       LoadGuest(
@@ skipping 832 matching lines @@
 INSTANTIATE_TEST_CASE_P(WithoutThreadedCompositor,
     WebViewCaptureTest,
     ::testing::Values(std::string(switches::kDisableThreadedCompositing)));
 
 // http://crbug.com/171744
 #if !defined(OS_MACOSX)
 INSTANTIATE_TEST_CASE_P(WithThreadedCompositor,
     WebViewCaptureTest,
     ::testing::Values(std::string(switches::kEnableThreadedCompositing)));
 #endif