Only show a beforeunload dialog if a frame has had a user gesture since its load.

content/browser/web_contents/web_contents_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 861 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(SitePerProcessBrowserTest,
                            TwoSubframesCreatePopupsSimultaneously);
   FRIEND_TEST_ALL_PREFIXES(SitePerProcessBrowserTest,
                            TwoSubframesCreatePopupMenuWidgetsSimultaneously);
   FRIEND_TEST_ALL_PREFIXES(SitePerProcessAccessibilityBrowserTest,
                            CrossSiteIframeAccessibility);
   FRIEND_TEST_ALL_PREFIXES(WebContentsImplBrowserTest,
                            JavaScriptDialogsInMainAndSubframes);
   FRIEND_TEST_ALL_PREFIXES(RenderFrameHostImplBrowserTest,
                            IframeBeforeUnloadParentHang);
+  FRIEND_TEST_ALL_PREFIXES(RenderFrameHostImplBrowserTest,
+                           BeforeUnloadDialogRequiresGesture);
 
   // So |find_request_manager_| can be accessed for testing.
   friend class FindRequestManagerTest;
 
   // TODO(brettw) TestWebContents shouldn't exist!
   friend class TestWebContents;
 
   class DestructionObserver;
 
   // Represents a WebContents node in a tree of WebContents structure.
@@ skipping 694 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_