Auto-install/uninstall shared module dependencies for extensions.

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 393 matching lines @@
     return;
 
   if (SharedModuleInfo::ImportsModules(extension())) {
     const std::vector<SharedModuleInfo::ImportInfo>& imports =
         SharedModuleInfo::GetImports(extension());
     std::vector<SharedModuleInfo::ImportInfo>::const_iterator i;
     for (i = imports.begin(); i != imports.end(); ++i) {
       Version version_required(i->minimum_version);
       const Extension* imported_module =
           service->GetExtensionById(i->extension_id, true);
-      if (!imported_module ||
-          (version_required.IsValid() &&
-           imported_module->version()->CompareTo(version_required) < 0)) {
-        ReportFailureFromUIThread(
-            CrxInstallerError(l10n_util::GetStringFUTF16(
-                IDS_EXTENSION_INSTALL_DEPENDENCY_NOT_FOUND,
-                ASCIIToUTF16(i->extension_id),
-                ASCIIToUTF16(i->minimum_version))));
-        return;
-      }
-      if (!SharedModuleInfo::IsSharedModule(imported_module)) {
+      if (imported_module &&
+          !SharedModuleInfo::IsSharedModule(imported_module)) {
         ReportFailureFromUIThread(
             CrxInstallerError(l10n_util::GetStringFUTF16(
                 IDS_EXTENSION_INSTALL_DEPENDENCY_NOT_SHARED_MODULE,
                 ASCIIToUTF16(i->extension_id))));
         return;
       }
     }
   }
   installer_.CheckRequirements(base::Bind(&CrxInstaller::OnRequirementsChecked,
                                           this));
@@ skipping 373 matching lines @@
   if (!prefs->DidExtensionEscalatePermissions(extension()->id()))
     return;
 
   if (client_) {
     AddRef();  // Balanced in InstallUIProceed() and InstallUIAbort().
     client_->ConfirmReEnable(this, extension());
   }
 }
 
 }  // namespace extensions