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

chrome/browser/history/snippet_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 "chrome/browser/history/snippet.h"
 
 #include <algorithm>
 
-#include "base/logging.h"
 #include "base/string_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 // A sample document to compute snippets of.
 // The \x bits after the first "Google" are UTF-8 of U+2122 TRADE MARK SIGN,
 // and are useful for verifying we don't screw up in UTF-8/UTF-16 conversion.
 const char* kSampleDocument = "Google\xe2\x84\xa2 Terms of Service "
 "Welcome to Google! "
@@ skipping 223 matching lines @@
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(data); ++i) {
     Snippet::MatchPositions matches;
     Snippet::ExtractMatchPositions(data[i].offsets_string, "0", &matches);
     EXPECT_EQ(data[i].expected_match_count, matches.size());
     for (size_t j = 0; j < data[i].expected_match_count; ++j) {
       EXPECT_EQ(data[i].expected_matches[2 * j], matches[j].first);
       EXPECT_EQ(data[i].expected_matches[2 * j + 1], matches[j].second);
     }
   }
 }