Moves extension_icon_image and image_loader to extensions/browser

extensions/browser/component_extension_resource_manager.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/browser/component_extension_resource_manager.h"
+
+#include "base/logging.h"
+
+namespace extensions {
+
+namespace {
+
+ComponentExtensionResourceManager* g_instance = NULL;
+
+}  // namespace
+
+// static
+void ComponentExtensionResourceManager::Set(
+    ComponentExtensionResourceManager* manager) {
+  if (g_instance)
+    delete g_instance;
+  g_instance = manager;
+}
+
+// static
+ComponentExtensionResourceManager* ComponentExtensionResourceManager::Get() {
+  DCHECK(g_instance);
+  return g_instance;
+}
+
+// static
+bool ComponentExtensionResourceManager::HasInstance() {
+  return g_instance;
+}
+
+}  // namespace extensions