Add a flag showing whether the current request was ignored by a handler

chrome/browser/errorpage_browsertest.cc

 // 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.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 467 matching lines @@
  public:
   explicit TestFailProvisionalLoadObserver(content::WebContents* contents)
       : content::WebContentsObserver(contents) {}
   ~TestFailProvisionalLoadObserver() override {}
 
   // This method is invoked when the provisional load failed.
   void DidFailProvisionalLoad(
       content::RenderFrameHost* render_frame_host,
       const GURL& validated_url,
       int error_code,
-      const base::string16& error_description) override {
+      const base::string16& error_description,
+      bool was_ignored_by_handler) override {
     fail_url_ = validated_url;
   }
 
   const GURL& fail_url() const { return fail_url_; }
 
  private:
   GURL fail_url_;
 
   DISALLOW_COPY_AND_ASSIGN(TestFailProvisionalLoadObserver);
 };
@@ skipping 721 matching lines @@
   ui_test_utils::NavigateToURL(
       browser(),
       URLRequestFailedJob::GetMockHttpUrlForHostname(net::ERR_UNSAFE_PORT,
                                                      kHostname));
 
   ToggleHelpBox(browser());
   EXPECT_TRUE(IsDisplayingText(browser(), kHostnameJSUnicode));
 }
 
 }  // namespace