Convert most remaining resources to use the API/thunk system. The significant

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/ppapi_preferences.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::EnterResourceNoLock;
 using ppapi::thunk::PPB_ImageData_API;
 using ppapi::WebKitForwarding;
 
 namespace pp {
 namespace proxy {
 
 namespace {
 
 bool PPTextRunToTextRun(const PP_TextRun_Dev* run,
                         WebKitForwarding::Font::TextRun* output) {
@@ skipping 112 matching lines @@
   return result;
 }
 
 PP_Bool Font::DrawTextAt(PP_Resource pp_image_data,
                          const PP_TextRun_Dev* text,
                          const PP_Point* position,
                          uint32_t color,
                          const PP_Rect* clip,
                          PP_Bool image_data_is_opaque) {
   // Convert to an ImageData object.
-  ppapi::ResourceObjectBase* image_base =
-      ppapi::TrackerBase::Get()->GetResourceAPI(pp_image_data);
-  if (!image_base)
+  EnterResourceNoLock<PPB_ImageData_API> enter(pp_image_data, true);
+  if (enter.failed())
     return PP_FALSE;
-  PPB_ImageData_API* image_api = image_base->GetAs<PPB_ImageData_API>();
-  if (!image_api)
-    return PP_FALSE;
-  ImageData* image_data = static_cast<ImageData*>(image_api);
+  ImageData* image_data = static_cast<ImageData*>(enter.object());
 
   skia::PlatformCanvas* canvas = image_data->mapped_canvas();
   bool needs_unmapping = false;
   if (!canvas) {
     needs_unmapping = true;
     image_data->Map();
     canvas = image_data->mapped_canvas();
     if (!canvas)
       return PP_FALSE;  // Failure mapping.
   }
@@ skipping 51 matching lines @@
   return result;
 }
 
 void Font::RunOnWebKitThread(const base::Closure& task) {
   GetDispatcher()->PostToWebKitThread(FROM_HERE, task);
   webkit_event_.Wait();
 }
 
 }  // namespace proxy
 }  // namespace pp