Validate hash_sha256 checksum on .crx update.

chrome/browser/extensions/crx_installer.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 "chrome/browser/extensions/crx_installer.h"
 
 #include <map>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 152 matching lines @@
 
 CrxInstaller::~CrxInstaller() {
   // Make sure the UI is deleted on the ui thread.
   if (client_) {
     BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, client_);
     client_ = NULL;
   }
 }
 
 void CrxInstaller::InstallCrx(const base::FilePath& source_file) {
+  InstallCrxFile(CRXFileInfo(source_file));
+}
+
+void CrxInstaller::InstallCrxFile(const CRXFileInfo& source_file) {
   ExtensionService* service = service_weak_.get();
   if (!service || service->browser_terminating())
     return;
 
   NotifyCrxInstallBegin();
 
-  source_file_ = source_file;
+  source_file_ = source_file.path;
 
   scoped_refptr<SandboxedUnpacker> unpacker(
       new SandboxedUnpacker(source_file,
                             install_source_,
                             creation_flags_,
                             install_directory_,
                             installer_task_runner_.get(),
                             this));
 
   if (!installer_task_runner_->PostTask(
@@ skipping 724 matching lines @@
   if (!prefs->DidExtensionEscalatePermissions(extension()->id()))
     return;
 
   if (client_) {
     AddRef();  // Balanced in InstallUIProceed() and InstallUIAbort().
     client_->ConfirmReEnable(this, extension());
   }
 }
 
 }  // namespace extensions