Add an API around zygoteHost so that chrome doesn't reach into the internal content implementation.

content/browser/child_process_launcher.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/child_process_launcher.h"
 
 #include <utility>  // For std::pair.
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 10 matching lines @@
 #include "content/public/common/result_codes.h"
 
 #if defined(OS_WIN)
 #include "base/file_path.h"
 #include "content/common/sandbox_policy.h"
 #elif defined(OS_MACOSX)
 #include "content/browser/mach_broker_mac.h"
 #elif defined(OS_POSIX)
 #include "base/memory/singleton.h"
 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
-#include "content/browser/zygote_host_linux.h"
+#include "content/browser/zygote_host_impl_linux.h"
 #endif
 
 #if defined(OS_POSIX)
 #include "base/global_descriptors_posix.h"
 #endif
 
 using content::BrowserThread;
 
 // Having the functionality of ChildProcessLauncher be in an internal
 // ref counted object allows us to automatically terminate the process when the
@@ skipping 91 matching lines @@
         cmd_line->GetSwitchValueASCII(switches::kProcessType);
     int crash_signal_fd =
         content::GetContentClient()->browser()->GetCrashSignalFD(*cmd_line);
     if (use_zygote) {
       base::GlobalDescriptors::Mapping mapping;
       mapping.push_back(std::pair<uint32_t, int>(kPrimaryIPCChannel, ipcfd));
       if (crash_signal_fd >= 0) {
         mapping.push_back(std::pair<uint32_t, int>(kCrashDumpSignal,
                                                    crash_signal_fd));
       }
-      handle = ZygoteHost::GetInstance()->ForkRequest(cmd_line->argv(),
-                                                      mapping,
-                                                      process_type);
+      handle = ZygoteHostImpl::GetInstance()->ForkRequest(cmd_line->argv(),
+                                                          mapping,
+                                                          process_type);
     } else
     // Fall through to the normal posix case below when we're not zygoting.
 #endif
     {
       base::FileHandleMappingVector fds_to_map;
       fds_to_map.push_back(std::make_pair(
           ipcfd,
           kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor));
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
@@ skipping 113 matching lines @@
     base::Process process(handle);
      // Client has gone away, so just kill the process.  Using exit code 0
     // means that UMA won't treat this as a crash.
     process.Terminate(content::RESULT_CODE_NORMAL_EXIT);
     // On POSIX, we must additionally reap the child.
 #if defined(OS_POSIX)
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
     if (zygote) {
       // If the renderer was created via a zygote, we have to proxy the reaping
       // through the zygote process.
-      ZygoteHost::GetInstance()->EnsureProcessTerminated(handle);
+      ZygoteHostImpl::GetInstance()->EnsureProcessTerminated(handle);
     } else
 #endif  // !OS_MACOSX
     {
       base::EnsureProcessTerminated(handle);
     }
 #endif  // OS_POSIX
     process.Close();
   }
 
   Client* client_;
@@ skipping 52 matching lines @@
     int* exit_code) {
   base::ProcessHandle handle = context_->process_.handle();
   if (handle == base::kNullProcessHandle) {
     // Process is already gone, so return the cached termination status.
     if (exit_code)
       *exit_code = context_->exit_code_;
     return context_->termination_status_;
   }
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
   if (context_->zygote_) {
-    context_->termination_status_ = ZygoteHost::GetInstance()->
+    context_->termination_status_ = ZygoteHostImpl::GetInstance()->
         GetTerminationStatus(handle, &context_->exit_code_);
   } else
 #endif
   {
     context_->termination_status_ =
         base::GetTerminationStatus(handle, &context_->exit_code_);
   }
 
   if (exit_code)
     *exit_code = context_->exit_code_;
@@ skipping 16 matching lines @@
       base::Bind(
           &ChildProcessLauncher::Context::SetProcessBackgrounded,
           GetHandle(), background));
 }
 
 void ChildProcessLauncher::SetTerminateChildOnShutdown(
   bool terminate_on_shutdown) {
   if (context_)
     context_->set_terminate_child_on_shutdown(terminate_on_shutdown);
 }