New implementation of font precache on Windows.

content/renderer/render_thread.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_H_
 #define CONTENT_RENDERER_RENDER_THREAD_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 209 matching lines @@
   // We initialize WebKit as late as possible.
   void EnsureWebKitInitialized();
 
   // Helper function to send over a string to be recorded by user metrics
   static void RecordUserMetrics(const std::string& action);
 
 #if defined(OS_WIN)
   // Request that the given font be loaded by the browser so it's cached by the
   // OS. Please see ChildProcessHost::PreCacheFont for details.
   static bool PreCacheFont(const LOGFONT& log_font);
+
+  // Release cached font.
+  static bool ReleaseCachedFonts();
 #endif  // OS_WIN
 
  private:
   virtual bool OnControlMessageReceived(const IPC::Message& msg);
 
   void Init();
 
   void OnSetZoomLevelForCurrentURL(const GURL& url, double zoom_level);
   void OnDOMStorageEvent(const DOMStorageMsg_Event_Params& params);
   void OnSetNextPageID(int32 next_page_id);
@@ skipping 49 matching lines @@
 
   // Map of registered v8 extensions. The key is the extension name.
   std::set<std::string> v8_extensions_;
 
   ObserverList<RenderProcessObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThread);
 };
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_H_