Enable size_t to int truncation warnings in PPAPI

ppapi/proxy/platform_verification_private_resource.cc

 // Copyright 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/platform_verification_private_resource.h"
 
 #include "base/bind.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/dispatch_reply_message.h"
 #include "ppapi/proxy/ppapi_messages.h"
@@ skipping 70 matching lines @@
     const std::vector<uint8_t>& raw_signed_data_signature,
     const std::string& raw_platform_key_certificate) {
   if (!TrackedCallback::IsPending(output_params.callback) ||
       TrackedCallback::IsScheduledToRun(output_params.callback)) {
     return;
   }
 
   if (params.result() == PP_OK) {
     *(output_params.signed_data) =
         (PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferVar(
-            raw_signed_data.size(), &raw_signed_data.front()))->GetPPVar();
+            static_cast<uint32_t>(raw_signed_data.size()),
+            &raw_signed_data.front()))->GetPPVar();
     *(output_params.signed_data_signature) =
         (PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferVar(
-            raw_signed_data_signature.size(),
+            static_cast<uint32_t>(raw_signed_data_signature.size()),
             &raw_signed_data_signature.front()))->GetPPVar();
     *(output_params.platform_key_certificate) =
         (new StringVar(raw_platform_key_certificate))->GetPPVar();
   }
   output_params.callback->Run(params.result());
 }
 
 }  // namespace proxy
 }  // namespace ppapi