Have each SandboxedProcessLauncherDelegate maintain a zygote.

content/browser/utility_process_host_impl.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 "content/browser/utility_process_host_impl.h"
 
 #include <utility>
 
 #include "base/base_switches.h"
 #include "base/bind.h"
@@ skipping 40 matching lines @@
   UtilitySandboxedProcessLauncherDelegate(const base::FilePath& exposed_dir,
                                           bool launch_elevated,
                                           bool no_sandbox,
                                           const base::EnvironmentMap& env,
                                           ChildProcessHost* host)
       : exposed_dir_(exposed_dir),
 #if defined(OS_WIN)
         launch_elevated_(launch_elevated)
 #elif defined(OS_POSIX)
         env_(env),
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
         no_sandbox_(no_sandbox),
+#endif  // !defined(OS_MACOSX)  && !defined(OS_ANDROID)
         ipc_fd_(host->TakeClientFileDescriptor())
 #endif  // OS_WIN
   {}
 
   ~UtilitySandboxedProcessLauncherDelegate() override {}
 
 #if defined(OS_WIN)
   bool ShouldLaunchElevated() override { return launch_elevated_; }
 
   bool PreSpawnTarget(sandbox::TargetPolicy* policy) override {
     if (exposed_dir_.empty())
       return true;
 
     sandbox::ResultCode result;
     result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES,
                              sandbox::TargetPolicy::FILES_ALLOW_ANY,
                              exposed_dir_.value().c_str());
     if (result != sandbox::SBOX_ALL_OK)
       return false;
 
     base::FilePath exposed_files = exposed_dir_.AppendASCII("*");
     result = policy->AddRule(sandbox::TargetPolicy::SUBSYS_FILES,
                              sandbox::TargetPolicy::FILES_ALLOW_ANY,
                              exposed_files.value().c_str());
     return result == sandbox::SBOX_ALL_OK;
   }
 
 #elif defined(OS_POSIX)
 
-  bool ShouldUseZygote() override {
-    return !no_sandbox_ && exposed_dir_.empty();
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
+  ZygoteHandle* GetZygote() override {
+    if (no_sandbox_ || !exposed_dir_.empty())
+      return nullptr;
+    static ZygoteHandle zygote;
+    return &zygote;
   }
+#endif  // !defined(OS_MACOSX) && !defined(OS_ANDROID)
   base::EnvironmentMap GetEnvironment() override { return env_; }
   base::ScopedFD TakeIpcFd() override { return std::move(ipc_fd_); }
 #endif  // OS_WIN
 
   SandboxType GetSandboxType() override {
     return SANDBOX_TYPE_UTILITY;
   }
 
  private:
   base::FilePath exposed_dir_;
 
 #if defined(OS_WIN)
   bool launch_elevated_;
 #elif defined(OS_POSIX)
   base::EnvironmentMap env_;
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
   bool no_sandbox_;
+#endif  // !defined(OS_MACOSX) && !defined(OS_ANDROID)
   base::ScopedFD ipc_fd_;
 #endif  // OS_WIN
 };
 
 UtilityMainThreadFactoryFunction g_utility_main_thread_factory = NULL;
 
 UtilityProcessHost* UtilityProcessHost::Create(
     const scoped_refptr<UtilityProcessHostClient>& client,
     const scoped_refptr<base::SequencedTaskRunner>& client_task_runner) {
   return new UtilityProcessHostImpl(client, client_task_runner);
@@ skipping 259 matching lines @@
     if (RenderProcessHost::run_renderer_in_process())
       handle = base::GetCurrentProcessHandle();
     else
       handle = process_->GetData().handle;
 
     mojo_application_host_->Activate(this, handle);
   }
 }
 
 }  // namespace content