Misc cleanup in net/spdy/core.

net/spdy/core/hpack/hpack_output_stream_test.cc

 // Copyright 2014 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/core/hpack/hpack_output_stream.h"
 
 #include <cstddef>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 
 namespace {
 
 // Make sure that AppendBits() appends bits starting from the most
 // significant bit, and that it can handle crossing a byte boundary.
 TEST(HpackOutputStreamTest, AppendBits) {
   HpackOutputStream output_stream;
   SpdyString expected_str;
 
   output_stream.AppendBits(0x1, 1);
   expected_str.append(1, 0x00);
-  *expected_str.rbegin() |= (0x1 << 7);
+  expected_str.back() |= (0x1 << 7);
 
   output_stream.AppendBits(0x0, 1);
 
   output_stream.AppendBits(0x3, 2);
   *expected_str.rbegin() |= (0x3 << 4);
 
   output_stream.AppendBits(0x0, 2);
 
   // Byte-crossing append.
   output_stream.AppendBits(0x7, 3);
   *expected_str.rbegin() |= (0x7 >> 1);
   expected_str.append(1, 0x00);
-  *expected_str.rbegin() |= (0x7 << 7);
+  expected_str.back() |= (0x7 << 7);
 
   output_stream.AppendBits(0x0, 7);
 
   SpdyString str;
   output_stream.TakeString(&str);
   EXPECT_EQ(expected_str, str);
 }
 
 // Utility function to return I as a string encoded with an N-bit
 // prefix.
@@ skipping 220 matching lines @@
   output_stream.BoundedTakeString(9, &str);
   EXPECT_EQ("uffer456\xff", str);
 
   output_stream.BoundedTakeString(9, &str);
   EXPECT_EQ("\x10", str);
 }
 
 }  // namespace
 
 }  // namespace net