Remove logging.h from cc files that don't use it.

base/pickle_unittest.cc

 // Copyright (c) 2006-2008 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 <string>
 
 #include "base/basictypes.h"
-#include "base/logging.h"
 #include "base/pickle.h"
 #include "base/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 const int testint = 2093847192;
 const std::string teststr("Hello world"); // note non-aligned string length
 const std::wstring testwstr(L"Hello, world");
 const char testdata[] = "AAA\0BBB\0";
@@ skipping 192 matching lines @@
 TEST(PickleTest, EqualsOperator) {
   Pickle source;
   source.WriteInt(1);
 
   Pickle copy_refs_source_buffer(static_cast<const char*>(source.data()),
                                  source.size());
   Pickle copy;
   copy = copy_refs_source_buffer;
   ASSERT_EQ(source.size(), copy.size());
 }