Use a single, generic, global zygote to temporarily resolve perf regressions.

content/browser/browser_main_loop.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/browser_main_loop.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 138 matching lines @@
 #elif defined(OS_MACOSX) && !defined(OS_IOS)
 #include "content/browser/device_monitor_mac.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include "content/browser/renderer_host/render_sandbox_host_linux.h"
 #include "content/browser/zygote_host/zygote_host_impl_linux.h"
 #include "sandbox/linux/suid/client/setuid_sandbox_host.h"
 
 #if !defined(OS_ANDROID)
-#include "content/browser/ppapi_plugin_process_host.h"
-#endif
-#endif
+#include "content/public/browser/zygote_handle_linux.h"
+#endif  // !defined(OS_ANDROID)
+#endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
+
 
 #if defined(ENABLE_PLUGINS)
 #include "content/browser/plugin_service_impl.h"
 #endif
 
 #if defined(TCMALLOC_TRACE_MEMORY_SUPPORTED)
 #include "third_party/tcmalloc/chromium/src/gperftools/heap-profiler.h"
 #endif
 
 #if defined(USE_X11)
@@ skipping 48 matching lines @@
       // otherwise.
       LOG(FATAL) << no_suid_error;
     }
   } else {
     LOG(ERROR) << no_suid_error;
   }
 
   // Tickle the sandbox host and zygote host so they fork now.
   RenderSandboxHostLinux::GetInstance()->Init();
   ZygoteHostImpl::GetInstance()->Init(sandbox_binary.value());
+  *GetGenericZygote() = CreateZygote();
   RenderProcessHostImpl::EarlyZygoteLaunch();
-  PpapiPluginProcessHost::EarlyZygoteLaunch();
-  UtilityProcessHostImpl::EarlyZygoteLaunch();
 }
 #endif
 
 #if defined(USE_GLIB)
 static void GLibLogHandler(const gchar* log_domain,
                            GLogLevelFlags log_level,
                            const gchar* message,
                            gpointer userdata) {
   if (!log_domain)
     log_domain = "<unknown>";
@@ skipping 1225 matching lines @@
   DCHECK(is_tracing_startup_for_duration_);
 
   is_tracing_startup_for_duration_ = false;
   TracingController::GetInstance()->StopTracing(
       TracingController::CreateFileSink(
           startup_trace_file_,
           base::Bind(OnStoppedStartupTracing, startup_trace_file_)));
 }
 
 }  // namespace content