Do not initialize event routers in the Profile Import process.

chrome/browser/profiles/profile_impl.cc

 // Copyright (c) 2011 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/profiles/profile_impl.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/environment.h"
 #include "base/file_path.h"
@@ skipping 487 matching lines @@
   GetChromeURLDataManager()->AddDataSource(new ExtensionIconSource(this));
 
   // Initialize extension event routers. Note that on Chrome OS, this will
   // not succeed if the user has not logged in yet, in which case the
   // event routers are initialized in LoginUtilsImpl::CompleteLogin instead.
   // The InitEventRouters call used to be in BrowserMain, because when bookmark
   // import happened on first run, the bookmark bar was not being correctly
   // initialized (see issue 40144). Now that bookmarks aren't imported and
   // the event routers need to be initialized for every profile individually,
   // initialize them with the extension service.
-  extension_service_->InitEventRouters();
+  // If this profile is being created as part of the import process, never
+  // initialize the event routers. If import is going to run in a separate
+  // process (the profile itself is on the main process), wait for import to
+  // finish before initializing the routers.
+  if (!command_line->HasSwitch(switches::kImport) &&
+      !command_line->HasSwitch(switches::kImportFromFile)) {
+    if (g_browser_process->profile_manager()->will_import()) {
+      extension_service_->InitEventRoutersAfterImport();
+    } else {
+      extension_service_->InitEventRouters();
+    }
+  }
 }
 
 void ProfileImpl::RegisterComponentExtensions() {
   // Register the component extensions.
   //
   // Component extension manifest must contain a 'key' property with a unique
   // public key, serialized in base64. You can create a suitable value with the
   // following commands on a unixy system:
   //
   //   ssh-keygen -t rsa -b 1024 -N '' -f /tmp/key.pem
@@ skipping 1202 matching lines @@
 #endif
   }
   return prerender_manager_.get();
 }
 
 SpellCheckProfile* ProfileImpl::GetSpellCheckProfile() {
   if (!spellcheck_profile_.get())
     spellcheck_profile_.reset(new SpellCheckProfile());
   return spellcheck_profile_.get();
 }