Enable size_t to int truncation warnings in PPAPI

ppapi/proxy/websocket_resource.cc

 // Copyright (c) 2012 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/websocket_resource.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
+#include "base/numerics/safe_conversions.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/proxy/dispatch_reply_message.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/shared_impl/ppapi_globals.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/shared_impl/var_tracker.h"
 
 namespace {
 
 const uint32_t kMaxReasonSizeInBytes = 123;
@@ skipping 395 matching lines @@
 void WebSocketResource::OnPluginMsgReceiveBinaryReply(
     const ResourceMessageReplyParams& params,
     const std::vector<uint8_t>& message) {
   // Dispose packets after receiving an error or in invalid state.
   if (error_was_received_ || !InValidStateToReceive(state_))
     return;
 
   // Append received data to queue.
   scoped_refptr<Var> message_var(
       PpapiGlobals::Get()->GetVarTracker()->MakeArrayBufferVar(
-          message.size(),
+          base::checked_cast<uint32_t>(message.size()),
           &message.front()));
   received_messages_.push(message_var);
 
   if (!TrackedCallback::IsPending(receive_callback_) ||
       TrackedCallback::IsScheduledToRun(receive_callback_)) {
     return;
   }
 
   receive_callback_->Run(DoReceive());
 }
@@ skipping 39 matching lines @@
     return PP_OK;
 
   *receive_callback_var_ = received_messages_.front()->GetPPVar();
   received_messages_.pop();
   receive_callback_var_ = NULL;
   return PP_OK;
 }
 
 }  // namespace proxy
 }  // namespace ppapi