Fix extension content verification out-of-band hash fetching

chrome/browser/extensions/extension_service.cc

 // Copyright (c) 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 "chrome/browser/extensions/extension_service.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <iterator>
+#include <memory>
 #include <set>
+#include <utility>
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_tokenizer.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 1737 matching lines @@
     pending_extension_manager()->Remove(id);
   } else {
     // We explicitly want to re-enable an uninstalled external
     // extension; if we're here, that means the user is manually
     // installing the extension.
     if (extension_prefs_->IsExternalExtensionUninstalled(id)) {
       disable_reasons = Extension::DISABLE_NONE;
     }
   }
 
+  // If the old version of the extension was disabled due to corruption, this
+  // new install may correct the problem.
+  disable_reasons &= ~Extension::DISABLE_CORRUPTED;
+
   // Unsupported requirements overrides the management policy.
   if (install_flags & extensions::kInstallFlagHasRequirementErrors) {
     disable_reasons |= Extension::DISABLE_UNSUPPORTED_REQUIREMENT;
   } else {
     // Requirement is supported now, remove the corresponding disable reason
     // instead.
     disable_reasons &= ~Extension::DISABLE_UNSUPPORTED_REQUIREMENT;
   }
 
   // Check if the extension was disabled because of the minimum version
@@ skipping 694 matching lines @@
 }
 
 void ExtensionService::OnProfileDestructionStarted() {
   ExtensionIdSet ids_to_unload = registry_->enabled_extensions().GetIDs();
   for (ExtensionIdSet::iterator it = ids_to_unload.begin();
        it != ids_to_unload.end();
        ++it) {
     UnloadExtension(*it, UnloadedExtensionInfo::REASON_PROFILE_SHUTDOWN);
   }
 }