winaura: Do not create WindowObservers for BrowserPlugin.

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 924 matching lines @@
 }
 
 IN_PROC_BROWSER_TEST_F(WebViewTest, Shim_TestResizeWebviewResizesContent) {
   TestHelper("testResizeWebviewResizesContent",
              "web_view/shim",
              NO_TEST_SERVER);
 }
 
 // This test makes sure we do not crash if app is closed while interstitial
 // page is being shown in guest.
-// Test flaky on windows; http://crbug.com/297014 .
-#if defined(OS_WIN)
-#define MAYBE_InterstitialTeardown DISABLED_InterstitialTeardown
-#else
-#define MAYBE_InterstitialTeardown InterstitialTeardown
-#endif
 IN_PROC_BROWSER_TEST_F(WebViewTest, MAYBE_InterstitialTeardown) {
   // Start a HTTPS server so we can load an interstitial page inside guest.
   net::SpawnedTestServer::SSLOptions ssl_options;
   ssl_options.server_certificate =
       net::SpawnedTestServer::SSLOptions::CERT_MISMATCHED_NAME;
   net::SpawnedTestServer https_server(
       net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
       base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
   ASSERT_TRUE(https_server.Start());
 
@@ skipping 833 matching lines @@
     pepper_plugin.append(FILE_PATH_LITERAL(";application/x-ppapi-tests"));
     command_line->AppendSwitchNative(switches::kRegisterPepperPlugins,
                                      pepper_plugin);
   }
 };
 
 IN_PROC_BROWSER_TEST_F(WebViewPluginTest, TestLoadPluginEvent) {
   TestHelper("testPluginLoadPermission", "web_view/shim", NO_TEST_SERVER);
 }
 #endif  // defined(ENABLE_PLUGINS)