Update ppapi/ to use scoped_refptr<T>::get() rather than implicit "operator T*"

ppapi/proxy/pdf_resource.cc

 // Copyright (c) 2013 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/pdf_resource.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include "base/command_line.h"
@@ skipping 106 matching lines @@
   Post(RENDERER, PpapiHostMsg_PDF_SetContentRestriction(restrictions));
 }
 
 void PDFResource::HistogramPDFPageCount(int count) {
   UMA_HISTOGRAM_COUNTS_10000("PDF.PageCount", count);
 }
 
 void PDFResource::UserMetricsRecordAction(const PP_Var& action) {
   scoped_refptr<ppapi::StringVar> action_str(
       ppapi::StringVar::FromPPVar(action));
-  if (action_str) {
+  if (action_str.get()) {
     Post(RENDERER,
          PpapiHostMsg_PDF_UserMetricsRecordAction(action_str->value()));
   }
 }
 
 void PDFResource::HasUnsupportedFeature() {
   Post(RENDERER, PpapiHostMsg_PDF_HasUnsupportedFeature());
 }
 
 void PDFResource::Print() {
@@ skipping 55 matching lines @@
 #error Not implemented.
 #endif
 }
 
 PP_Resource PDFResource::GetResourceImage(PP_ResourceImage image_id) {
   return GetResourceImageForScale(image_id, 1.0f);
 }
 
 }  // namespace proxy
 }  // namespace ppapi