Enforce the 'requirements' field in manifests.

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"
 #include "base/file_util.h"
 #include "base/lazy_instance.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
 #include "base/scoped_temp_dir.h"
-#include "base/stl_util.h"
+#include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/version.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/convert_user_script.h"
 #include "chrome/browser/extensions/convert_web_app.h"
 #include "chrome/browser/extensions/default_apps_trial.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_install_ui.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/permissions_updater.h"
+#include "chrome/browser/extensions/requirements_checker.h"
 #include "chrome/browser/extensions/webstore_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/web_applications/web_app.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/extensions/extension_icon_set.h"
 #include "chrome/common/extensions/extension_switch_utils.h"
@@ skipping 52 matching lines @@
       create_app_shortcut_(false),
       frontend_weak_(frontend_weak),
       profile_(frontend_weak->profile()),
       client_(client),
       apps_require_extension_mime_type_(false),
       allow_silent_install_(false),
       install_cause_(extension_misc::INSTALL_CAUSE_UNSET),
       creation_flags_(Extension::NO_FLAGS),
       off_store_install_allow_reason_(OffStoreInstallDisallowed),
       did_handle_successfully_(true),
-      record_oauth2_grant_(false) {
+      record_oauth2_grant_(false),
+      error_on_unsupported_requirements_(false),
+      requirements_checker_(new extensions::RequirementsChecker()),
+      has_requirement_errors_(false) {
   if (!approval)
     return;
 
   CHECK(profile_->IsSameProfile(approval->profile));
   client_->install_ui()->SetUseAppInstalledBubble(
       approval->use_app_installed_bubble);
   client_->install_ui()->SetSkipPostInstallUI(approval->skip_post_install_ui);
 
   if (approval->skip_install_dialog) {
     // Mark the extension as approved, but save the expected manifest and ID
@@ skipping 263 matching lines @@
   }
 
   if (client_) {
     Extension::DecodeIcon(extension_.get(),
                           extension_misc::EXTENSION_ICON_LARGE,
                           ExtensionIconSet::MATCH_BIGGER,
                           &install_icon_);
   }
 
   if (!BrowserThread::PostTask(
-          BrowserThread::UI, FROM_HERE,
-          base::Bind(&CrxInstaller::ConfirmInstall, this)))
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&CrxInstaller::CheckRequirements, this)))
     NOTREACHED();
 }
 
+void CrxInstaller::CheckRequirements() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  AddRef();  // Balanced in OnRequirementsChecked().
+  requirements_checker_->Check(extension_,
+                               base::Bind(&CrxInstaller::OnRequirementsChecked,
+                                          this));
+}
+
+void CrxInstaller::OnRequirementsChecked(
+    std::vector<std::string> requirement_errors) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  Release();  // Balanced in CheckRequirements().
+  if (!requirement_errors.empty()) {
+    if (error_on_unsupported_requirements_) {
+      ReportFailureFromUIThread(CrxInstallerError(
+          UTF8ToUTF16(JoinString(requirement_errors, ' '))));
+      return;
+    }
+    has_requirement_errors_ = true;
+  }
+
+  ConfirmInstall();
+}
+
 void CrxInstaller::ConfirmInstall() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!frontend_weak_.get())
     return;
 
   string16 error;
   if (!ExtensionSystem::Get(profile_)->management_policy()->
       UserMayLoad(extension_, &error)) {
     ReportFailureFromUIThread(CrxInstallerError(error));
     return;
@@ skipping 182 matching lines @@
   // We update the extension's granted permissions if the user already approved
   // the install (client_ is non NULL), or we are allowed to install this
   // silently.
   if (client_ || allow_silent_install_) {
     PermissionsUpdater perms_updater(profile());
     perms_updater.GrantActivePermissions(extension_, record_oauth2_grant_);
   }
 
   // Tell the frontend about the installation and hand off ownership of
   // extension_ to it.
-  frontend_weak_->OnExtensionInstalled(extension_, is_gallery_install(),
-                                       page_ordinal_);
+  frontend_weak_->OnExtensionInstalled(extension_,
+                                       is_gallery_install(),
+                                       page_ordinal_,
+                                       has_requirement_errors_);
 
   NotifyCrxInstallComplete(extension_.get());
 
   extension_ = NULL;
 
   // We're done. We don't post any more tasks to ourselves so we are deleted
   // soon.
 }
 
 void CrxInstaller::NotifyCrxInstallComplete(const Extension* extension) {
   // Some users (such as the download shelf) need to know when a
   // CRXInstaller is done.  Listening for the EXTENSION_* events
   // is problematic because they don't know anything about the
   // extension before it is unpacked, so they cannot filter based
   // on the extension.
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_CRX_INSTALLER_DONE,
       content::Source<CrxInstaller>(this),
       content::Details<const Extension>(extension));
 }
 
 }  // namespace extensions