Replace "external_install" boolean parameter with explicit enumeration in ExtensionUninstall method.

chrome/browser/extensions/shared_module_service.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 "chrome/browser/extensions/shared_module_service.h"
 
 #include <vector>
 
 #include "base/version.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 135 matching lines @@
   for (ImportInfoVector::const_iterator iter = imports.begin();
        iter != imports.end();
        ++iter) {
     const Extension* imported_module =
         registry->GetExtensionById(iter->extension_id,
                                    ExtensionRegistry::EVERYTHING);
     if (imported_module && imported_module->from_webstore()) {
       scoped_ptr<const ExtensionSet> dependents =
           GetDependentExtensions(imported_module);
       if (dependents->is_empty()) {
-        service->UninstallExtension(iter->extension_id,
-                                    true,  // External uninstall.
-                                    NULL);  // Ignore error.
+        service->UninstallExtension(
+            iter->extension_id,
+            ExtensionService::kUninstallReasonOrphanedSharedModule,
+            NULL);  // Ignore error.
       }
     }
   }
 }
 
 void SharedModuleService::OnExtensionUninstalled(const Extension* extension) {
   PruneSharedModulesOnUninstall(extension);
 }
 
 void SharedModuleService::OnShutdown() {
   InstallTracker::Get(context_)->RemoveObserver(this);
   observing_ = false;
 }
 
 }  // namespace extensions