Pepper: always delete ResourceMessageFilter objects on the creation thread.

content/browser/renderer_host/pepper/pepper_browser_font_singleton_host.cc

 // 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/browser/renderer_host/pepper/pepper_browser_font_singleton_host.h"
 
 #include "base/threading/sequenced_worker_pool.h"
 #include "base/values.h"
 #include "content/common/font_list.h"
 #include "content/public/browser/browser_ppapi_host.h"
@@ skipping 20 matching lines @@
 
  private:
   virtual ~FontMessageFilter();
 
   // Message handler.
   int32_t OnHostMsgGetFontFamilies(ppapi::host::HostMessageContext* context);
 
   DISALLOW_COPY_AND_ASSIGN(FontMessageFilter);
 };
 
-FontMessageFilter::FontMessageFilter() {
+FontMessageFilter::FontMessageFilter()
+    : ResourceMessageFilter(DELETE_ON_ANY_THREAD) {
 }
 
 FontMessageFilter::~FontMessageFilter() {
 }
 
 scoped_refptr<base::TaskRunner> FontMessageFilter::OverrideTaskRunnerForMessage(
     const IPC::Message& msg) {
   // Use the blocking pool to get the font list (currently the only message)
   // Since getting the font list is non-threadsafe on Linux (for versions of
   // Pango predating 2013), use a sequenced task runner.
@@ skipping 50 matching lines @@
     PP_Resource resource)
     : ResourceHost(host->GetPpapiHost(), instance, resource) {
   AddFilter(scoped_refptr<ppapi::host::ResourceMessageFilter>(
       new FontMessageFilter()));
 }
 
 PepperBrowserFontSingletonHost::~PepperBrowserFontSingletonHost() {
 }
 
 }  // namespace content