Support getting the font list in Pepper. This currently only works out of

content/browser/font_list_async.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 "content/browser/font_list_async.h"
+
+#include "base/bind.h"
+#include "base/values.h"
+#include "content/browser/browser_thread.h"
+#include "content/common/font_list.h"
+
+namespace content {
+
+namespace {
+
+// Just executes the given callback with the parameter.
+void ReturnFontListToOriginalThread(
+    const base::Callback<void(scoped_refptr<FontListResult>)>& callback,
+    scoped_refptr<FontListResult> result) {
+  callback.Run(result);
+}
+
+void GetFontListOnFileThread(
+    BrowserThread::ID calling_thread_id,
+    const base::Callback<void(scoped_refptr<FontListResult>)>& callback) {
+  scoped_refptr<FontListResult> result(new FontListResult);
+  result->list.reset(GetFontList_SlowBlocking());
+  BrowserThread::PostTask(calling_thread_id, FROM_HERE,
+      base::Bind(&ReturnFontListToOriginalThread, callback, result));
+}
+
+}  // namespace
+
+FontListResult::FontListResult() {
+}
+
+FontListResult::~FontListResult() {
+}
+
+void GetFontListAsync(
+    const base::Callback<void(scoped_refptr<FontListResult>)>& callback) {
+  BrowserThread::ID id;
+  bool well_known_thread = BrowserThread::GetCurrentThreadIdentifier(&id);
+  DCHECK(well_known_thread)
+      << "Can only call GetFontList from a well-known thread.";
+
+  BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
+      base::Bind(&GetFontListOnFileThread, id, callback));
+}
+
+}  // namespace content