Do not reset navigation state when BeforeUnload is cancelled by a commit

content/shell/browser/shell_javascript_dialog_manager.cc

Index: content/shell/browser/shell_javascript_dialog_manager.cc
diff --git a/content/shell/browser/shell_javascript_dialog_manager.cc b/content/shell/browser/shell_javascript_dialog_manager.cc
index fdd57253c5ac48338859c303bf901a1af60a0440..cf2cbf74c46301b4217db963efbda6844ca7aba0 100644
--- a/content/shell/browser/shell_javascript_dialog_manager.cc
+++ b/content/shell/browser/shell_javascript_dialog_manager.cc
@@ -15,8 +15,8 @@
 
 namespace content {
 
-ShellJavaScriptDialogManager::ShellJavaScriptDialogManager() {
-}
+ShellJavaScriptDialogManager::ShellJavaScriptDialogManager()
+    : proceed_beforeunload_default_(true) {}
 
 ShellJavaScriptDialogManager::~ShellJavaScriptDialogManager() {
 }
@@ -68,9 +68,14 @@ void ShellJavaScriptDialogManager::RunBeforeUnloadDialog(
     WebContents* web_contents,
     bool is_reload,
     const DialogClosedCallback& callback) {
+  // During tests, if the BeforeUnload should not proceed automatically, store
+  // the callback and return.
   if (!dialog_request_callback_.is_null()) {
     dialog_request_callback_.Run();
-    callback.Run(true, base::string16());
+    if (proceed_beforeunload_default_)
+      callback.Run(true, base::string16());
+    else
+      before_unload_callback_ = callback;
     dialog_request_callback_.Reset();
     return;
   }
@@ -113,6 +118,10 @@ void ShellJavaScriptDialogManager::CancelActiveAndPendingDialogs(
 }
 
 void ShellJavaScriptDialogManager::ResetDialogState(WebContents* web_contents) {
+  if (before_unload_callback_.is_null())
+    return;
+  before_unload_callback_.Run(false, base::string16());
+  before_unload_callback_.Reset();
 }
 
 void ShellJavaScriptDialogManager::DialogClosed(ShellJavaScriptDialog* dialog) {