Replace NULL with nullptr or null in webrtc/base/.

webrtc/base/stringutils_unittest.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 15 matching lines @@
 }
 
 // It's not clear if we will ever use wchar_t strings on unix.  In theory,
 // all strings should be Utf8 all the time, except when interfacing with Win32
 // APIs that require Utf16.
 
 #if defined(WEBRTC_WIN)
 
 // Tests for ascii_string_compare().
 
-// Tests NULL input.
+// Tests null input.
 TEST(ascii_string_compareTest, NullInput) {
   // The following results in an access violation in
   // ascii_string_compare.  Is this a bug or by design?  stringutils.h
   // should document the expected behavior in this case.
 
-  // EXPECT_EQ(0, ascii_string_compare(NULL, NULL, 1, identity));
+  // EXPECT_EQ(0, ascii_string_compare(nullptr, nullptr, 1, identity));
 }
 
 // Tests comparing two strings of different lengths.
 TEST(ascii_string_compareTest, DifferentLengths) {
   EXPECT_EQ(-1, ascii_string_compare(L"Test", "Test1", 5, identity));
 }
 
 // Tests the case where the buffer size is smaller than the string
 // lengths.
 TEST(ascii_string_compareTest, SmallBuffer) {
@@ skipping 46 matching lines @@
   EXPECT_TRUE(ends_with("foobar", "bar"));
   EXPECT_TRUE(ends_with("foobar", "foobar"));
   EXPECT_TRUE(ends_with("foobar", ""));
   EXPECT_TRUE(ends_with("", ""));
   EXPECT_FALSE(ends_with("foobar", "foo"));
   EXPECT_FALSE(ends_with("foobar", "foobarbaz"));
   EXPECT_FALSE(ends_with("", "f"));
 }
 
 } // namespace rtc