Fix crash when a webview tries to load a plugin resource.

chrome/browser/apps/guest_view/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 "base/path_service.h"
 #include "base/process/process.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/chrome_content_browser_client.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/prerender/prerender_link_manager.h"
 #include "chrome/browser/prerender/prerender_link_manager_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
 #include "chrome/browser/renderer_context_menu/render_view_context_menu_test_util.h"
 #include "chrome/browser/task_manager/task_manager_browsertest_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
+#include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/browser/interstitial_page.h"
 #include "content/public/browser/interstitial_page_delegate.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/fake_speech_recognition_manager.h"
 #include "content/public/test/test_renderer_host.h"
@@ skipping 2708 matching lines @@
   LoadAppWithGuest("web_view/inside_iframe");
 }
 
 // <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);
 }
 
+// Tests that browser process does not crash when loading plugin inside
+// <webview> with content settings set to CONTENT_SETTING_BLOCK.
+IN_PROC_BROWSER_TEST_F(WebViewTest, TestPlugin) {
+  browser()->profile()->GetHostContentSettingsMap()->SetDefaultContentSetting(
+      CONTENT_SETTINGS_TYPE_PLUGINS, CONTENT_SETTING_BLOCK);
+  TestHelper("testPlugin", "web_view/shim", NEEDS_TEST_SERVER);
+}
+
 #if defined(OS_WIN)
 // Test is disabled on Windows because it times out often.
 // http://crbug.com/403325
 #define MAYBE_WebViewInBackgroundPage \
     DISABLED_WebViewInBackgroundPage
 #else
 #define MAYBE_WebViewInBackgroundPage WebViewInBackgroundPage
 #endif
 IN_PROC_BROWSER_TEST_F(WebViewTest, MAYBE_WebViewInBackgroundPage) {
   ASSERT_TRUE(RunExtensionTest("platform_apps/web_view/background"))
       << message_;
 }
 
 // This test verifies that the allowtransparency attribute properly propagates
 IN_PROC_BROWSER_TEST_F(WebViewTest, AllowTransparencyAndAllowScalingPropagate) {
   LoadAppWithGuest("web_view/simple");
 
   ASSERT_TRUE(!!GetGuestWebContents());
   extensions::WebViewGuest* guest =
       extensions::WebViewGuest::FromWebContents(GetGuestWebContents());
   ASSERT_TRUE(guest->allow_transparency());
   ASSERT_TRUE(guest->allow_scaling());
 }