Initialize blink only when needed in utility processes.

content/utility/utility_main.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 "base/command_line.h"
 #include "base/debug/leak_annotations.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/platform_thread.h"
 #include "base/timer/hi_res_timer_manager.h"
 #include "content/child/child_process.h"
 #include "content/common/sandbox_linux/sandbox_linux.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/sandbox_init.h"
 #include "content/utility/utility_thread_impl.h"
 
 #if defined(OS_WIN)
+#include "base/rand_util.h"
 #include "sandbox/win/src/sandbox.h"
 #endif
 
 namespace content {
 
 // Mainline routine for running as the utility process.
 int UtilityMain(const MainFunctionParams& parameters) {
   // The main message loop of the utility process.
   base::MessageLoop main_message_loop;
   base::PlatformThread::SetName("CrUtilityMain");
@@ skipping 17 matching lines @@
     sandbox::TargetServices* target_services =
         parameters.sandbox_info->target_services;
     if (!target_services)
       return false;
 #if defined(ADDRESS_SANITIZER)
     // Bind and leak dbghelp.dll before the token is lowered, otherwise
     // AddressSanitizer will crash when trying to symbolize a report.
     if (!LoadLibraryA("dbghelp.dll"))
       return false;
 #endif
+    char buffer;
+    // Ensure RtlGenRandom is warm before the token is lowered; otherwise,
+    // base::RandBytes() will CHECK fail when v8 is initialized.
+    base::RandBytes(&buffer, sizeof(buffer));
     target_services->LowerToken();
   }
 #endif
 
   base::MessageLoop::current()->Run();
 
 #if defined(LEAK_SANITIZER)
   // Invoke LeakSanitizer before shutting down the utility thread, to avoid
   // reporting shutdown-only leaks.
   __lsan_do_leak_check();
 #endif
 
   return 0;
 }
 
 }  // namespace content