Remove explicit keyword from multi-argument constructors

chrome/browser/rlz/rlz.cc

 // Copyright (c) 2011 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.
 //
 // This code glues the RLZ library DLL with Chrome. It allows Chrome to work
 // with or without the DLL being present. If the DLL is not present the
 // functions do nothing and just return false.
 
 #include "chrome/browser/rlz/rlz.h"
 
@@ skipping 158 matching lines @@
   // Organic brands all start with GG, such as GGCM.
   static bool is_organic(const std::wstring& brand) {
     return (brand.size() < 2) ? false : (brand.substr(0, 2) == L"GG");
   }
 };
 
 // Performs late RLZ initialization and RLZ event recording for chrome.
 // This task needs to run on the UI thread.
 class DelayedInitTask : public Task {
  public:
-  explicit DelayedInitTask(bool first_run, bool google_default_search)
+  DelayedInitTask(bool first_run, bool google_default_search)
       : first_run_(first_run),
         google_default_search_(google_default_search) {
   }
   virtual ~DelayedInitTask() {
   }
   virtual void Run() {
     // For non-interactive tests we don't do the rest of the initialization
     // because sometimes the very act of loading the dll causes QEMU to crash.
     if (::GetEnvironmentVariableW(ASCIIToWide(env_vars::kHeadless).c_str(),
                                   NULL, 0)) {
@@ skipping 198 matching lines @@
     cached_ommibox_rlz.assign(*rlz);
     access_values_state = ACCESS_VALUES_FRESH;
   }
   return true;
 }
 
 // static
 void RLZTracker::CleanupRlz() {
   OmniBoxUsageObserver::DeleteInstance();
 }