Made chrome_main_delegate match the base class's definition.

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/lazy_instance.h"
 #include "base/message_loop.h"
 #include "base/metrics/field_trial.h"
@@ skipping 666 matching lines @@
       process_type != switches::kServiceProcess;
 }
 
 bool ChromeMainDelegate::DelaySandboxInitialization(
     const std::string& process_type) {
   // NaClLoader does this in NaClMainPlatformDelegate::EnableSandbox().
   // No sandbox needed for relauncher.
   return process_type == switches::kNaClLoaderProcess ||
       process_type == switches::kRelauncherProcess;
 }
-#elif defined(OS_POSIX)
+#elif defined(OS_POSIX) && !defined(OS_ANDROID)
 content::ZygoteForkDelegate* ChromeMainDelegate::ZygoteStarting() {
 #if defined(DISABLE_NACL)
   return NULL;
 #else
   return new NaClForkDelegate();
 #endif
 }
 
 void ChromeMainDelegate::ZygoteForked() {
   Profiling::ProcessStarted();
@@ skipping 22 matching lines @@
 
 content::ContentRendererClient*
     ChromeMainDelegate::CreateContentRendererClient() {
   return &g_chrome_content_renderer_client.Get();
 }
 
 content::ContentUtilityClient*
     ChromeMainDelegate::CreateContentUtilityClient() {
   return &g_chrome_content_utility_client.Get();
 }