Convert resources to take an instance key instead of an Instance*.

ppapi/cpp/trusted/browser_font_trusted.cc

 // Copyright (c) 2010 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/cpp/trusted/browser_font_trusted.h"
 
 #include <algorithm>
 
 #include "ppapi/c/dev/ppb_font_dev.h"
 #include "ppapi/cpp/image_data.h"
@@ skipping 140 matching lines @@
 BrowserFont_Trusted& BrowserFont_Trusted::operator=(
     const BrowserFont_Trusted& other) {
   Resource::operator=(other);
   return *this;
 }
 
 // static
 Var BrowserFont_Trusted::GetFontFamilies(Instance* instance) {
   if (!has_interface<PPB_Font_Dev>())
     return Var();
-  return Var(Var::PassRef(),
+  return Var(PASS_REF,
              get_interface<PPB_Font_Dev>()->GetFontFamilies(
                  instance->pp_instance()));
 }
 
 bool BrowserFont_Trusted::Describe(
     BrowserFontDescription* description,
     PP_BrowserFont_Trusted_Metrics* metrics) const {
   // Be careful with ownership of the |face| string. It will come back with
   // a ref of 1, which we want to assign to the |face_| member of the C++ class.
   if (has_interface<PPB_BrowserFont_Trusted>()) {
     if (!get_interface<PPB_BrowserFont_Trusted>()->Describe(
         pp_resource(), &description->pp_font_description_, metrics))
       return false;
   } else if (!has_interface<PPB_Font_Dev>()) {
     if (!get_interface<PPB_Font_Dev>()->Describe(
         pp_resource(),
         BrowserFontDescToFontDesc(&description->pp_font_description_),
         BrowserFontMetricsToFontMetrics(metrics)))
       return false;
   }
-  description->face_ = Var(Var::PassRef(),
+  description->face_ = Var(PASS_REF,
                            description->pp_font_description_.face);
   return true;
 }
 
 bool BrowserFont_Trusted::DrawTextAt(ImageData* dest,
                                      const BrowserFontTextRun& text,
                                      const Point& position,
                                      uint32_t color,
                                      const Rect& clip,
                                      bool image_data_is_opaque) const {
@@ skipping 74 matching lines @@
     bool image_data_is_opaque) const {
   return DrawTextAt(dest, BrowserFontTextRun(text), position, color,
                     Rect(dest->size()), image_data_is_opaque);
 }
 
 int32_t BrowserFont_Trusted::MeasureSimpleText(const std::string& text) const {
   return MeasureText(BrowserFontTextRun(text));
 }
 
 }  // namespace pp