Add missing (and remove superfluous) 'explicit' from constructors.

rlz/lib/rlz_lib_test.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.
 //
 // A test application for the RLZ library.
 //
 // These tests should not be executed on the build server:
 // - They assert for the failed cases.
 // - They modify machine state (registry).
 //
@@ skipping 421 matching lines @@
   base::Thread io_thread("rlz_unittest_io_thread");
   ASSERT_TRUE(io_thread.StartWithOptions(options));
 
   scoped_refptr<net::TestURLRequestContextGetter> context =
       new net::TestURLRequestContextGetter(
           io_thread.message_loop()->message_loop_proxy());
   rlz_lib::SetURLRequestContext(context.get());
 
   class URLRequestRAII {
     public:
-     URLRequestRAII(net::URLRequestContextGetter* context) {
+     explicit URLRequestRAII(net::URLRequestContextGetter* context) {
        rlz_lib::SetURLRequestContext(context);
      }
      ~URLRequestRAII() {
        rlz_lib::SetURLRequestContext(NULL);
      }
   };
 
   URLRequestRAII set_context(context.get());
 #endif
 
@@ skipping 430 matching lines @@
   int mkdir_result = mkdir(rlz_lib::testing::RlzStoreFilenameStr().c_str(),
                            0500);
   ASSERT_EQ(0, mkdir_result);
 
   rlz_lib::SupplementaryBranding branding("TEST");
   EXPECT_FALSE(rlz_lib::RecordProductEvent(rlz_lib::TOOLBAR_NOTIFIER,
       rlz_lib::IE_DEFAULT_SEARCH, rlz_lib::INSTALL));
 }
 
 #endif