Pass ID of the calling extension to the native messaging host.

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

Index: chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
diff --git a/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc b/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
index 382f482e638d64bd2454351301bf9d1e68434153..63ccaab7e0b6719885b20d8083900efaf6e2f013 100644
--- a/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
+++ b/chrome/browser/extensions/api/messaging/native_process_launcher_win.cc
@@ -64,7 +64,7 @@ NativeProcessLauncher::FindAndLoadManifest(
 
 // static
 bool NativeProcessLauncher::LaunchNativeProcess(
-    const base::FilePath& path,
+    const CommandLine& command_line,
     base::PlatformFile* read_file,
     base::PlatformFile* write_file) {
   // Timeout for the IO pipes.
@@ -117,13 +117,15 @@ bool NativeProcessLauncher::LaunchNativeProcess(
   scoped_ptr<wchar_t[]> comspec(new wchar_t[comspec_length]);
   ::GetEnvironmentVariable(L"COMSPEC", comspec.get(), comspec_length);
 
+  string16 command_line_string = command_line.GetCommandLineString();
+
   // 'start' command has a moronic syntax: if first argument is quoted then it
   // interprets it as a command title. Host path must always be in quotes, so
   // we always need to specify the title as the first argument.
   string16 command = base::StringPrintf(
       L"%ls /c start \"Chrome Native Messaging Host\" /b "
-      L"\"%ls\" < %ls > %ls",
-      comspec.get(), path.value().c_str(),
+      L"%ls < %ls > %ls",
+      comspec.get(), command_line_string.c_str(),
       in_pipe_name.c_str(), out_pipe_name.c_str());
 
   base::LaunchOptions options;