Add a Content API around BrowserChildProcessHost, similar to what was done with ChildProcessHost....

chrome/browser/nacl_host/nacl_broker_host_win.cc

Index: chrome/browser/nacl_host/nacl_broker_host_win.cc
===================================================================
--- chrome/browser/nacl_host/nacl_broker_host_win.cc	(revision 118420)
+++ chrome/browser/nacl_host/nacl_broker_host_win.cc	(working copy)
@@ -14,11 +14,13 @@
 #include "chrome/common/logging_chrome.h"
 #include "chrome/common/nacl_cmd_line.h"
 #include "chrome/common/nacl_messages.h"
+#include "content/public/browser/browser_child_process_host.h"
 #include "content/public/common/child_process_host.h"
 
 NaClBrokerHost::NaClBrokerHost()
-    : BrowserChildProcessHost(content::PROCESS_TYPE_NACL_BROKER),
-      stopping_(false) {
+    : stopping_(false) {
+  process_.reset(content::BrowserChildProcessHost::Create(
+      content::PROCESS_TYPE_NACL_BROKER, this));
 }
 
 NaClBrokerHost::~NaClBrokerHost() {
@@ -26,7 +28,7 @@
 
 bool NaClBrokerHost::Init() {
   // Create the channel that will be used for communicating with the broker.
-  std::string channel_id = child_process_host()->CreateChannel();
+  std::string channel_id = process_->GetHost()->CreateChannel();
   if (channel_id.empty())
     return false;
 
@@ -45,7 +47,7 @@
   if (logging::DialogsAreSuppressed())
     cmd_line->AppendSwitch(switches::kNoErrorDialogs);
 
-  BrowserChildProcessHost::Launch(FilePath(), cmd_line);
+  process_->Launch(FilePath(), cmd_line);
   return true;
 }
 
@@ -60,7 +62,8 @@
 
 bool NaClBrokerHost::LaunchLoader(
     const std::wstring& loader_channel_id) {
-  return Send(new NaClProcessMsg_LaunchLoaderThroughBroker(loader_channel_id));
+  return process_->Send(
+      new NaClProcessMsg_LaunchLoaderThroughBroker(loader_channel_id));
 }
 
 void NaClBrokerHost::OnLoaderLaunched(const std::wstring& loader_channel_id,
@@ -70,5 +73,5 @@
 
 void NaClBrokerHost::StopBroker() {
   stopping_ = true;
-  Send(new NaClProcessMsg_StopBroker());
+  process_->Send(new NaClProcessMsg_StopBroker());
 }