Parse /etc/lsb-release only once on ChromeOS

chrome/app/chrome_main_delegate.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.
 
 #include "chrome/app/chrome_main_delegate.h"
 
 #include "base/command_line.h"
 #include "base/environment.h"
 #include "base/files/file_path.h"
 #include "base/i18n/rtl.h"
@@ skipping 726 matching lines @@
   // sets this up for the browser process in a different manner. Zygotes
   // need to call InitCrashReporter() in RunZygote().
   if (!process_type.empty() && process_type != switches::kZygoteProcess) {
 #if defined(OS_ANDROID)
     InitNonBrowserCrashReporterForAndroid();
 #else
     InitCrashReporter();
 #endif
   }
 #endif
-
-#if defined(OS_CHROMEOS)
-  // Read and cache ChromeOS version from file,
-  // to be used from inside the sandbox.
-  int32 major_version, minor_version, bugfix_version;
-  base::SysInfo::OperatingSystemVersionNumbers(
-      &major_version, &minor_version, &bugfix_version);
-#endif
 }
 
 void ChromeMainDelegate::SandboxInitialized(const std::string& process_type) {
   startup_timer_->Stop();  // End of Startup Time Measurement.
 
   // Note: If you are adding a new process type below, be sure to adjust the
   // AdjustLinuxOOMScore function too.
 #if defined(OS_LINUX)
   AdjustLinuxOOMScore(process_type);
 #endif
@@ skipping 116 matching lines @@
 }
 
 content::ContentUtilityClient*
 ChromeMainDelegate::CreateContentUtilityClient() {
 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
   return NULL;
 #else
   return &g_chrome_content_utility_client.Get();
 #endif
 }