Move font IPCs to be RenderProcess messages.

content/common/render_process_messages.h

 // Copyright 2015 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.
 
 // Common IPC messages used for render processes.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
+#include "base/memory/shared_memory.h"
 #include "ipc/ipc_message_macros.h"
 #include "ipc/ipc_message_utils.h"
 #include "url/gurl.h"
 
+#if defined(OS_MACOSX)
+#include "content/common/mac/font_descriptor.h"
+#endif
+
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT CONTENT_EXPORT
 
 #define IPC_MESSAGE_START RenderProcessMsgStart
 
+#if defined(OS_MACOSX)
+IPC_STRUCT_TRAITS_BEGIN(FontDescriptor)
+  IPC_STRUCT_TRAITS_MEMBER(font_name)
+  IPC_STRUCT_TRAITS_MEMBER(font_point_size)
+IPC_STRUCT_TRAITS_END()
+#endif
+
 ////////////////////////////////////////////////////////////////////////////////
 // Messages sent from the browser to the render process.
 
 ////////////////////////////////////////////////////////////////////////////////
 // Messages sent from the render process to the browser.
 
 // Asks the browser process to generate a keypair for grabbing a client
 // certificate from a CA (<keygen> tag), and returns the signed public
 // key and challenge string.
 IPC_SYNC_MESSAGE_CONTROL3_1(RenderProcessHostMsg_Keygen,
                             uint32 /* key size index */,
                             std::string /* challenge string */,
                             GURL /* URL of requestor */,
                             std::string /* signed public key and challenge */)
+
+#if defined(OS_MACOSX)
+// Request that the browser load a font into shared memory for us.
+IPC_SYNC_MESSAGE_CONTROL1_3(RenderProcessHostMsg_LoadFont,
+                            FontDescriptor /* font to load */,
+                            uint32 /* buffer size */,
+                            base::SharedMemoryHandle /* font data */,
+                            uint32 /* font id */)
+#elif defined(OS_WIN)
+// Request that the given font characters be loaded by the browser so it's
+// cached by the OS. Please see RenderMessageFilter::OnPreCacheFontCharacters
+// for details.
+IPC_SYNC_MESSAGE_CONTROL2_0(RenderProcessHostMsg_PreCacheFontCharacters,
+                            LOGFONT /* font_data */,
+                            base::string16 /* characters */)
+#endif