Fix content verification code for undreadable and deleted files.

chrome/browser/extensions/content_verifier_browsertest.cc

 // Copyright 2014 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 <list>
 #include <set>
 #include <string>
 
 #include "base/bind_helpers.h"
 #include "base/callback_helpers.h"
@@ skipping 108 matching lines @@
 
 // Helper for forcing ContentVerifyJob's to return an error.
 class JobDelegate : public ContentVerifyJob::TestDelegate {
  public:
   JobDelegate()
       : fail_next_read_(false),
         fail_next_done_(false),
         bytes_read_failed_(0),
         done_reading_failed_(0) {}
 
-  virtual ~JobDelegate() {}
+  ~JobDelegate() override {}
 
   void set_id(const ExtensionId& id) { id_ = id; }
   void fail_next_read() { fail_next_read_ = true; }
   void fail_next_done() { fail_next_done_ = true; }
 
   // Return the number of BytesRead/DoneReading calls we actually failed,
   // respectively.
   int bytes_read_failed() { return bytes_read_failed_; }
   int done_reading_failed() { return done_reading_failed_; }
 
@@ skipping 687 matching lines @@
   // Assert that the first reinstall action happened with a delay of 0, and
   // then kept growing each additional time.
   ASSERT_EQ(iterations, calls.size());
   EXPECT_EQ(base::TimeDelta(), delay_tracker.calls()[0]);
   for (size_t i = 1; i < delay_tracker.calls().size(); i++) {
     EXPECT_LT(calls[i - 1], calls[i]);
   }
 }
 
 }  // namespace extensions