Fixes for re-enabling more MSVC level 4 warnings: net/spdy/ edition

net/spdy/buffered_spdy_framer_unittest.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 "net/spdy/buffered_spdy_framer.h"
 
 #include "net/spdy/spdy_test_util_common.h"
 #include "testing/platform_test.h"
 
 namespace net {
 
 namespace {
 
 class TestBufferedSpdyVisitor : public BufferedSpdyFramerVisitorInterface {
  public:
   explicit TestBufferedSpdyVisitor(SpdyMajorVersion spdy_version)
       : buffered_spdy_framer_(spdy_version, true),
         error_count_(0),
         setting_count_(0),
         syn_frame_count_(0),
         syn_reply_frame_count_(0),
         headers_frame_count_(0),
         push_promise_frame_count_(0),
-        header_stream_id_(-1),
-        promised_stream_id_(-1) {
+        header_stream_id_(static_cast<SpdyStreamId>(-1)),
+        promised_stream_id_(static_cast<SpdyStreamId>(-1)) {
   }
 
   virtual void OnError(SpdyFramer::SpdyError error_code) OVERRIDE {
     LOG(INFO) << "SpdyFramer Error: " << error_code;
     error_count_++;
   }
 
   virtual void OnStreamError(
       SpdyStreamId stream_id,
       const std::string& description) OVERRIDE {
@@ skipping 292 matching lines @@
   EXPECT_EQ(0, visitor.syn_frame_count_);
   EXPECT_EQ(0, visitor.syn_reply_frame_count_);
   EXPECT_EQ(0, visitor.headers_frame_count_);
   EXPECT_EQ(1, visitor.push_promise_frame_count_);
   EXPECT_TRUE(CompareHeaderBlocks(&headers, &visitor.headers_));
   EXPECT_EQ(1u, visitor.header_stream_id_);
   EXPECT_EQ(2u, visitor.promised_stream_id_);
 }
 
 }  // namespace net