New implementation of font precache on Windows.

content/common/view_messages.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.
 
 // IPC messages for page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "content/common/common_param_traits.h"
@@ skipping 1766 matching lines @@
 IPC_SYNC_MESSAGE_CONTROL1_3(ViewHostMsg_LoadFont,
                            FontDescriptor /* font to load */,
                            uint32 /* buffer size */,
                            base::SharedMemoryHandle /* font data */,
                            uint32 /* font id */)
 #endif
 
 #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.
-IPC_SYNC_MESSAGE_CONTROL1_0(ViewHostMsg_PreCacheFont,
-                            LOGFONT /* font data */)
+IPC_SYNC_MESSAGE_CONTROL2_0(ViewHostMsg_PreCacheFont,
+                            LOGFONT /* font data */,
+                            int /* pid */)
+IPC_MESSAGE_CONTROL1(ViewHostMsg_ReleaseCachedFont,
+                     int /* pid */)
 #endif  // defined(OS_WIN)
 
 // Returns WebScreenInfo corresponding to the view.
 // TODO(shess): Provide a mapping from reply_msg->routing_id() to
 // HWND so that we can eliminate the NativeViewId parameter.
 IPC_SYNC_MESSAGE_ROUTED1_1(ViewHostMsg_GetScreenInfo,
                            gfx::NativeViewId /* view */,
                            WebKit::WebScreenInfo /* results */)
 
 // Send the tooltip text for the current mouse position to the browser.
@@ skipping 326 matching lines @@
                     int32 /* complete status */)
 
 // Request updated information about the client firewall traversal policy.
 // Will result in a ViewMsg_UpdateRemoteAccessClientFirewallTraversal message
 // being sent back.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_RequestRemoteAccessClientFirewallTraversal)
 
 // Notifies the browser of an event occurring in the media pipeline.
 IPC_MESSAGE_CONTROL1(ViewHostMsg_MediaLogEvent,
                      media::MediaLogEvent /* event */)