chrome: Remove 10 exit time destructors and 2 static initializers.

chrome/browser/metrics/metrics_log.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.
 
 #include "chrome/browser/metrics/metrics_log.h"
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
+#include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/perftimer.h"
 #include "base/string_util.h"
 #include "base/sys_info.h"
 #include "base/third_party/nspr/prtime.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete.h"
 #include "chrome/browser/autocomplete/autocomplete_match.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/plugin_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/logging_chrome.h"
 #include "chrome/common/pref_names.h"
 #include "content/browser/gpu/gpu_data_manager.h"
 #include "googleurl/src/gurl.h"
 #include "ui/gfx/screen.h"
 #include "webkit/plugins/webplugininfo.h"
 
 #define OPEN_ELEMENT_FOR_SCOPE(name) ScopedElement scoped_element(this, name)
 
 // http://blogs.msdn.com/oldnewthing/archive/2004/10/25/247180.aspx
 #if defined(OS_WIN)
 extern "C" IMAGE_DOS_HEADER __ImageBase;
 #endif
 
+static base::LazyInstance<std::string,
+                          base::LeakyLazyInstanceTraits<std::string > >
+  g_version_extension = LAZY_INSTANCE_INITIALIZER;
+
 MetricsLog::MetricsLog(const std::string& client_id, int session_id)
     : MetricsLogBase(client_id, session_id, MetricsLog::GetVersionString()) {}
 
 MetricsLog::~MetricsLog() {}
 
 // static
 void MetricsLog::RegisterPrefs(PrefService* local_state) {
   local_state->RegisterListPref(prefs::kStabilityPluginStats);
 }
 
@@ skipping 24 matching lines @@
 
 // static
 std::string MetricsLog::GetVersionString() {
   chrome::VersionInfo version_info;
   if (!version_info.is_valid()) {
     NOTREACHED() << "Unable to retrieve version info.";
     return std::string();
   }
 
   std::string version = version_info.Version();
-  if (!version_extension_.empty())
-    version += version_extension_;
+  if (!version_extension().empty())
+    version += version_extension();
   if (!version_info.IsOfficialBuild())
     version.append("-devel");
   return version;
 }
 
 MetricsLog* MetricsLog::AsMetricsLog() {
   return this;
 }
 
+// static
+void MetricsLog::set_version_extension(const std::string& extension) {
+  g_version_extension.Get() = extension;
+}
+
+// static
+const std::string& MetricsLog::version_extension() {
+  return g_version_extension.Get();
+}
+
 void MetricsLog::RecordIncrementalStabilityElements() {
   DCHECK(!locked_);
 
   PrefService* pref = g_browser_process->local_state();
   DCHECK(pref);
 
   OPEN_ELEMENT_FOR_SCOPE("profile");
   WriteCommonEventAttributes();
 
   WriteInstallElement();
@@ skipping 388 matching lines @@
       const std::string result_type(AutocompleteMatch::TypeToString(i->type));
       if (!result_type.empty())
         WriteAttribute("resulttype", result_type);
       WriteIntAttribute("relevance", i->relevance);
       WriteIntAttribute("isstarred", i->starred ? 1 : 0);
     }
   }
 
   ++num_events_;
 }