Introduce AppsClient and use it in apps to get the loaded profiles list.

apps/apps_client.cc

 // Copyright 2013 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 "apps/apps_client.h"
+
 #include "base/basictypes.h"
-#include "extensions/common/extensions_client.h"
 
-namespace extensions {
+namespace apps {
 
 namespace {
 
-ExtensionsClient* g_client = NULL;
-
-void Initialize(ExtensionsClient* client) {
-  client->RegisterManifestHandlers();
-}
+AppsClient* g_client = NULL;
 
 }  // namespace
 
-ExtensionsClient* ExtensionsClient::Get() {
+AppsClient* AppsClient::Get() {
   return g_client;
 }
 
-void ExtensionsClient::Set(ExtensionsClient* client) {
+void AppsClient::Set(AppsClient* client) {
   // This can happen in unit tests, where the utility thread runs in-process.
   if (g_client)
     return;
+
   g_client = client;
-  Initialize(g_client);
 }
 
-}  // namespace extensions
+}  // namespace apps