Support getting the font list in Pepper. This currently only works out of

ppapi/proxy/ppb_font_proxy.cc

 // 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.
 
 #include "ppapi/proxy/ppb_font_proxy.h"
 
 #include "base/bind.h"
 #include "ppapi/c/dev/ppb_font_dev.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/ppb_image_data_proxy.h"
+#include "ppapi/proxy/serialized_var.h"
 #include "ppapi/shared_impl/resource_object_base.h"
+#include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_image_data_api.h"
 #include "ppapi/thunk/thunk.h"
 
 using ppapi::thunk::PPB_ImageData_API;
 using ppapi::WebKitForwarding;
 
 namespace pp {
 namespace proxy {
 
 namespace {
@@ skipping 31 matching lines @@
   static const Info info = {
     ::ppapi::thunk::GetPPB_Font_Thunk(),
     PPB_FONT_DEV_INTERFACE,
     INTERFACE_ID_PPB_FONT,
     false,
     &CreateFontProxy,
   };
   return &info;
 }
 
+::ppapi::thunk::PPB_Font_FunctionAPI* PPB_Font_Proxy::AsFont_FunctionAPI() {
+  return this;
+}
+
+PP_Var PPB_Font_Proxy::GetFontFamilies(PP_Instance instance) {
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return PP_MakeUndefined();
+
+  // Assume the font families don't change, so we can cache the result globally.
+  static std::string families;
+  if (families.empty()) {
+    dispatcher->SendToBrowser(
+        new PpapiHostMsg_PPBFont_GetFontFamilies(&families));
+  }
+
+  PP_Var result;
+  result.type = PP_VARTYPE_STRING;
+  result.value.as_id = PluginVarTracker::GetInstance()->MakeString(families);
+  return result;
+}
+
 bool PPB_Font_Proxy::OnMessageReceived(const IPC::Message& msg) {
   // There aren't any font messages.
   NOTREACHED();
   return false;
 }
 
 Font::Font(const HostResource& resource,
            const PP_FontDescription_Dev& desc)
     : PluginResource(resource),
       webkit_event_(false, false) {
@@ skipping 119 matching lines @@
   return result;
 }
 
 void Font::RunOnWebKitThread(const base::Closure& task) {
   GetDispatcher()->PostToWebKitThread(FROM_HERE, task);
   webkit_event_.Wait();
 }
 
 }  // namespace proxy
 }  // namespace pp