Remove //chrome deps from ExtensionDownloader

extensions/shell/browser/shell_extensions_browser_client.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 "extensions/shell/browser/shell_extensions_browser_client.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_service_factory.h"
 #include "base/prefs/testing_pref_store.h"
 #include "components/pref_registry/pref_registry_syncable.h"
@@ skipping 208 matching lines @@
 }
 
 net::NetLog* ShellExtensionsBrowserClient::GetNetLog() {
   return NULL;
 }
 
 ExtensionCache* ShellExtensionsBrowserClient::GetExtensionCache() {
   return extension_cache_.get();
 }
 
+bool ShellExtensionsBrowserClient::IsBackgroundUpdateAllowed() {
+  return true;
+}
+
+bool ShellExtensionsBrowserClient::IsMinBrowserVersionSupported(
+    const std::string& min_version) {
+  return true;
+}
+
 }  // namespace extensions