Upgrade the windows specific version of LaunchProcess to avoid raw handles.

chrome/browser/extensions/api/messaging/native_message_process_host.cc

Index: chrome/browser/extensions/api/messaging/native_message_process_host.cc
diff --git a/chrome/browser/extensions/api/messaging/native_message_process_host.cc b/chrome/browser/extensions/api/messaging/native_message_process_host.cc
index 98976a103bf4c9c14c3da1eb1ada08c304067f41..c28b233dea7333b39a2e885cab378926a1657e05 100644
--- a/chrome/browser/extensions/api/messaging/native_message_process_host.cc
+++ b/chrome/browser/extensions/api/messaging/native_message_process_host.cc
@@ -47,7 +47,6 @@ NativeMessageProcessHost::NativeMessageProcessHost(
       native_host_name_(native_host_name),
       launcher_(launcher.Pass()),
       closed_(false),
-      process_handle_(base::kNullProcessHandle),
 #if defined(OS_POSIX)
       read_file_(-1),
 #endif
@@ -103,7 +102,7 @@ void NativeMessageProcessHost::LaunchHostProcess() {
 
 void NativeMessageProcessHost::OnHostProcessLaunched(
     NativeProcessLauncher::LaunchResult result,
-    base::ProcessHandle process_handle,
+    base::Process process,
     base::File read_file,
     base::File write_file) {
   DCHECK(task_runner_->BelongsToCurrentThread());
@@ -125,7 +124,7 @@ void NativeMessageProcessHost::OnHostProcessLaunched(
       break;
   }
 
-  process_handle_ = process_handle;
+  process_ = process.Pass();
 #if defined(OS_POSIX)
   // This object is not the owner of the file so it should not keep an fd.
   read_file_ = read_file.GetPlatformFile();
@@ -349,17 +348,17 @@ void NativeMessageProcessHost::Close(const std::string& error_message) {
     client_->CloseChannel(error_message);
   }
 
-  if (process_handle_ != base::kNullProcessHandle) {
+  if (process_.IsValid()) {
     // Kill the host process if necessary to make sure we don't leave zombies.
     // On OSX base::EnsureProcessTerminated() may block, so we have to post a
     // task on the blocking pool.
 #if defined(OS_MACOSX)
     content::BrowserThread::PostBlockingPoolTask(
-        FROM_HERE, base::Bind(&base::EnsureProcessTerminated, process_handle_));
+        FROM_HERE,
+        base::Bind(&base::EnsureProcessTerminated, Passed(&process_)));
 #else
-    base::EnsureProcessTerminated(process_handle_);
+    base::EnsureProcessTerminated(process_.Pass());
 #endif
-    process_handle_ = base::kNullProcessHandle;
   }
 }