Introduce background Download process to android

content/browser/child_process_launcher.cc

 // Copyright 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>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 345 matching lines @@
   }
 }
 
 void ChildProcessLauncher::Launch(
     SandboxedProcessLauncherDelegate* delegate,
     base::CommandLine* cmd_line,
     int child_process_id) {
   DCHECK(CalledOnValidThread());
 
 #if defined(OS_ANDROID)
-  // Android only supports renderer, sandboxed utility and gpu.
+  // Android only supports renderer, sandboxed utility, download and gpu.
   std::string process_type =
       cmd_line->GetSwitchValueASCII(switches::kProcessType);
   CHECK(process_type == switches::kGpuProcess ||
         process_type == switches::kRendererProcess ||
+        process_type == switches::kDownloadProcess ||
 #if defined(ENABLE_PLUGINS)
         process_type == switches::kPpapiPluginProcess ||
 #endif
         process_type == switches::kUtilityProcess)
       << "Unsupported process type: " << process_type;
 
   // Non-sandboxed utility or renderer process are currently not supported.
   DCHECK(process_type == switches::kGpuProcess ||
          !cmd_line->HasSwitch(switches::kNoSandbox));
 
@@ skipping 139 matching lines @@
 }
 
 ChildProcessLauncher::Client* ChildProcessLauncher::ReplaceClientForTest(
     Client* client) {
   Client* ret = client_;
   client_ = client;
   return ret;
 }
 
 }  // namespace content