stub impl of linux,mac icon loader/manager

chrome/browser/icon_loader.cc

+// Copyright (c) 2009 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/icon_loader.h"
+
+#include "base/message_loop.h"
+#include "base/thread.h"
+#include "chrome/browser/browser_process.h"
+#include "skia/include/SkBitmap.h"
+
+IconLoader::IconLoader(const IconGroupID& group, IconSize size,
+                       Delegate* delegate)
+    : group_(group),
+      icon_size_(size),
+      bitmap_(NULL),
+      delegate_(delegate) {
+}
+
+IconLoader::~IconLoader() {
+  delete bitmap_;
+}
+
+void IconLoader::Start() {
+  target_message_loop_ = MessageLoop::current();
+
+  g_browser_process->file_thread()->message_loop()->PostTask(FROM_HERE,
+      NewRunnableMethod(this, &IconLoader::ReadIcon));
+}
+
+void IconLoader::NotifyDelegate() {
+  delegate_->OnBitmapLoaded(this, bitmap_);
+  bitmap_ = NULL;
+}