Adds a stub method & classes for those which aren't used in android.

content/common/font_list_android.cc

Index: content/common/font_list_android.cc
diff --git a/content/common/font_list_android.cc b/content/common/font_list_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c860b1a5e02691f2e58df9e83ce27ad0c388be21
--- /dev/null
+++ b/content/common/font_list_android.cc
@@ -0,0 +1,15 @@
+// Copyright (c) 2012 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/common/font_list.h"
+
+#include "base/values.h"
+
+namespace content {
+
+ListValue* GetFontList_SlowBlocking() {
+  return new ListValue;
+}
+
+}  // namespace content